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OSP E100
Instruction Manual
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okuma OSP E100 Instruction Manual

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Page 1
GAUGING SYSTEMS
OSP-E100M / OSP-E10M
INSTRUCTION MANUAL
(8th Edition)
Pub No. 4297-E-R6 (ME51-221-R8) Aug. 2004
Page 2

SAFETY PRECAUTIONS

4297-E P-(i)
SAFETY PRECAUTIONS
The machine is equipped with safety devices which serve to protect personnel and the machine itself from hazards arising from unforeseen accidents. However, operators must not rely exclusively on these safety devices: they must also become fully familiar with the safety guidelines presented below to ensure accident-free operation. This instruction manual and the warning signs attached to the machine cover only those hazards which Okuma can predict. Be aware that they do not cover all possible hazards.

1. Precautions Relating to Machine Installation

(1) Install the machine at a site where the following conditions (the conditions for achievement of
the guaranteed accuracy) apply.
• Ambient temperature: 17 to 25°C
• Ambient humidity: 40% to 75% at 20°C (no condensation)
• Site not subject to direct sunlight or excessive vibration; environment as free of dust, acid,
corrosive gases, and salt spray as possible.
(2) Prepare a primary power supply that complies with the following requirements.
• Voltage: 200 V
• Voltage fluctuation: ±10% max.
• Power supply frequency: 50/60 Hz
• Do not draw the primary power supply from a distribution panel that also supplies a major
noise source (for example, an electric welder or electric discharge machine) since this could cause malfunction of the CNC unit.
• If possible, connect the machine to a ground not used by any other equipment. If there is no
choice but to use a common ground, the other equipment must not generate a large amount of noise (such as an electric welder or electric discharge machine).
(3) Installation Environment
Observe the following points when installing the control enclosure.
• Make sure that the CNC unit will not be subject to direct sunlight.
• Make sure that the control enclosure will not be splashed with chips, water, or oil.
• Make sure that the control enclosure and operation panel are not subject to excessive vibra-
tions or shock.
• The permissible ambient temperature range for the control enclosure is 0 to 40°C.
• The permissible ambient humidity range for the control enclosure is 30 to 95% (no conden-
sation).
• The maximum altitude at which the control enclosure can be used is 1000 m (3281ft.).

2. Points to Check before Turning on the Power

(1) Close all the doors of the control enclosure and operation panel to prevent the entry of water,
chips, and dust.
(2) Make absolutely sure that there is nobody near the moving parts of the machine, and that there
are no obstacles around the machine, before starting machine operation.
(3) When turning on the power, turn on the main power disconnect switch first, then the CONTROL
ON switch on the operation panel.
Page 3

3. Precautions Relating to Operation

4297-E P-(ii)
SAFETY PRECAUTIONS
(1) After turning on the power, carry out inspection and adjustment in accordance with the daily
inspection procedure described in this instruction manual.
(2) Use tools whose dimensions and type are appropriate for the work undertaken and the machine
specifications. Do not use badly worn tools since they can cause accidents.
(3) Do not, for any reason, touch the spindle or tool while spindle indexing is in progress since the
spindle could rotate: this is dangerous.
(4) Check that the workpiece and tool are properly secured.
(5) Never touch a workpiece or tool while it is rotating: this is extremely dangerous.
(6) Do not remove chips by hand while machining is in progress since this is dangerous. Always
stop the machine first, then remove the chips with a brush or broom.
(7) Do not operate the machine with any of the safety devices removed. Do not operate the
machine with any of the covers removed unless it is necessary to do so.
(8) Always stop the machine before mounting or removing a tool.
(9) Do not approach or touch any moving part of the machine while it is operating.
(10) Do not touch any switch or button with wet hands. This is extremely dangerous.
(11) Before using any switch or button on the operation panel, check that it is the one intended.

4. Precautions Relating to the ATC

(1) The tool clamps of the magazine, spindle, etc., are designed for reliability, but it is possible that
a tool could be released and fall in the event of an unforeseen accident, exposing you to danger: do not touch or approach the ATC mechanism during ATC operation.
(2) Always inspect and change tools in the magazine in the manual magazine interrupt mode.
(3) Remove chips adhering to the magazine at appropriate intervals since they can cause misoper-
ation. Do not use compressed air to remove these chips since it will only push the chips further in.
(4) If the ATC stops during operation for some reason and it has to be inspected without turning the
power off, do not touch the ATC since it may start moving suddenly.

5. On Finishing Work

(1) On finishing work, clean the vicinity of the machine.
(2) Return the ATC, APC and other equipment to the predetermined retraction position.
(3) Always turn off the power to the machine before leaving it.
(4) To turn off the power, turn off the CONTROL ON switch on the operation panel first, then the
main power disconnect switch.
Page 4
4297-E P-(iii)
SAFETY PRECAUTIONS

6. Precautions during Maintenance Inspection and When Trouble Occurs

In order to prevent unforeseen accidents, damage to the machine, etc., it is essential to observe the following points when performing maintenance inspections or during checking when trouble has occurred.
(1) When trouble occurs, press the emergency stop button on the operation panel to stop the
machine.
(2) Consult the person responsible for maintenance to determine what corrective measures need to
be taken.
(3) If two or more persons must work together, establish signals so that they can communicate to
confirm safety before proceeding to each new step.
(4) Use only the specified replacement parts and fuses.
(5) Always turn the power off before starting inspection or changing parts.
(6) When parts are removed during inspection or repair work, always replace them as they were
and secure them properly with their screws, etc.
(7) When carrying out inspections in which measuring instruments are used - for example voltage
checks - make sure the instrument is properly calibrated.
(8) Do not keep combustible materials or metals inside the control enclosure or terminal box.
(9) Check that cables and wires are free of damage: damaged cables and wires will cause current
leakage and electric shocks.
(10) Maintenance inside the Control Enclosure
a) Switch the main power disconnect switch OFF before opening the control enclosure door.
b) Even when the main power disconnect switch is OFF, there may some residual charge in the
MCS drive unit (servo/spindle), and for this reason only service personnel are permitted to perform any work on this unit. Even then, they must observe the following precautions.
• MCS drive unit (servo/spindle)
The residual voltage discharges two minutes after the main switch is turned OFF.
c) The control enclosure contains the NC unit, and the NC unit has a printed circuit board
whose memory stores the machining programs, parameters, etc. In order to ensure that the contents of this memory will be retained even when the power is switched off, the memory is supplied with power by a battery. Depending on how the printed circuit boards are handled, the contents of the memory may be destroyed and for this reason only service personnel should handle these boards.
(11) Periodic Inspection of the Control Enclosure
a) Cleaning the cooling unit
The cooling unit in the door of the control enclosure serves to prevent excessive temperature rise inside the control enclosure and increase the reliability of the NC unit. Inspect the follow­ing points every three months.
• Is the fan motor inside the cooling unit working?
The motor is normal if there is a strong draft from the unit.
• Is the external air inlet blocked?
If it is blocked, clean it with compressed air.
Page 5

7. General Precautions

4297-E P-(iv)
SAFETY PRECAUTIONS
(1) Keep the vicinity of the machine clean and tidy.
(2) Wear appropriate clothing while working, and follow the instructions of someone with sufficient
training.
(3) Make sure that your clothes and hair cannot become entangled in the machine. Machine opera-
tors must wear safety equipment such as safety shoes and goggles.
(4) Machine operators must read the instruction manual carefully and make sure of the correct pro-
cedure before operating the machine.
(5) Memorize the position of the emergency stop button so that you can press it immediately at any
time and from any position.
(6) Do not access the inside of the control panel, transformer, motor, etc., since they contain high-
voltage terminals and other components which are extremely dangerous.
(7) If two or more persons must work together, establish signals so that they can communicate to
confirm safety before proceeding to each new step.

8. Symbols Used in This Manual

The following warning indications are used in this manual to draw attention to information of particu­lar importance. Read the instructions marked with these symbols carefully and follow them.
DANGER
Indicates an imminent hazard which, if not avoided, will result in death or serious injury.
WARNING
CAUTION
NOTICE
Indicates hazards which, if not avoided, could result in death or serious injury.
Indicates hazards which, if not avoided, could result in minor injuries or damage to devices or equipment.
Indicates precautions relating to operation or use.
Page 6

INTRODUCTION

4297-E P-(i)
INTRODUCTION
Thank you very much for choosing our CNC system. This numerical control system is a expandable CNC with various features including a multi-main CPU system. Major features of the CNC system are described below.
(1) Expandable CNC with a multi-main CPU system
A multi-main CPU system on which up to seven engines (main CPUs) can be mounted is used. An excellent performance and cost effectiveness have been realized as a leader of increasingly rapid and accurate machine tools. The CNC system can be adapted to any models and varia­tions by changing the construction of the main CPUs. The machine is controlled by a built-in PLC.
(2) Compact and highly reliable
The CNC system has become compact and highly reliable because of advanced hardware technology, including UCMB (Universal Compact Main Board), I/O link, and servo link. The ‘variable software’ as a technical philosophy of the OSPs supported by a flash memory. Func­tions may be added to the CNC system as required after delivery.
(3) NC operation panels
The following types of NC operation panels are offered to improve the user-friendliness.
• Color CRT operation panels
• Thin color operation panels (horizontal)
• Thin color operation panels (vertical)
One or more of the above types may not be used for some models.
(4) Machining management functions
These functions contribute to the efficient operation of the CNC system and improve the profit­ability from small quantity production of multiple items and variable quantity production of varia­tions. Major control functions are described below.
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a) Reduction of setup time
With increase in small-volume production, machining data setting is more frequently needed. The simplified file operation facilitates such troublesome operation. The documents necessary for setup, such as work instructions, are displayed on the CNC system to elimi­nate the necessity of controlling drawings and further reduce the setup time.
b) Production Status Monitor
The progress and operation status can be checked on a real-time basis on the screen of the CNC system.
c) Reduction of troubleshooting time
Correct information is quickly available for troubleshooting.
(5) Help functions
When an alarm is raised, press the help key to view the content of the alarm. This helps take quick action against the alarm.
To operate the CNC system to its maximum performance, thoroughly read and understand this instruction manual before use. Keep this instruction manual at hand so that it will be available when you need a help.
Screens
Different screens are used for different models. Therefore, the screens used on your CNC system may differ from those shown in this manual.
Page 7

TABLE OF CONTENTS

TABLE OF CONTENTS
SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL
BREAKAGE DETECTION FUNCTION........................................................1
1. Overview ....................................................................................................................................... 1
1-1. Displaying the Result of Gauging .......................................................................................... 2
1-2. Function Menu ....................................................................................................................... 3
2. Automatic Tool Length Offset/Automatic Tool Breakage Detection Operation ............................. 9
2-1. Setting the Touch Sensor Zero Point .................................................................................. 10
2-2. Setting the Tool Pot No./Tool No. Table .............................................................................. 15
2-3. Operation Mode Designation............................................................................................... 16
2-4. Automatic Tool Length Offset Function ............................................................................... 18
2-5. Setting the Tool Change Position (Other Than MC-H) ........................................................ 22
2-6. Automatic Tool Breakage Detection .................................................................................... 23
2-7. Cycle Time Reduction for Automatic Tool Length Offset/Automatic Tool Breakage
Detection Cycle ................................................................................................................... 28
2-8. New Cycle Time Reduction Function for Automatic Tool Length Offset/Automatic Tool
Breakage Detection Cycle ................................................................................................... 30
4297-E P-(i)
3. Automatic Tool Length Offset/Automatic Tool Breakage Detection Function for
Special Tools and Attachments .................................................................................................. 34
3-1. Automatic Tool Length Offset/Automatic Tool Breakage Detection Function for
Horizontal Tools of MCM ..................................................................................................... 34
3-2. Operation for Automatic Tool Length Offset/Automatic Tool Breakage Detection on
B/C-axis Attachments, 90° Angular Attachments and Extension Attachments (Option) ..... 41
3-3. Operation of Automatic Tool Length Offset/Automatic Tool Breakage Detection with
30° Angular Attachments (Option)....................................................................................... 50
4. Y-axis Escape Position (MCM-B/MCR-B II/MCR-A/VH-40)........................................................ 62
4-1. Setting the Y-axis Escape Position...................................................................................... 62
4-2. Tool Movements during Automatic Tool Length Offset (Cutter Radius Compensation)/
Automatic Tool Breakage Detection Cycle .......................................................................... 63
5. Interference Prevention Measures for MCV-A/MCV-A II During Execution of the
Automatic Tool Length Offset/Automatic Tool Breakage Detection Cycle.................................. 64
5-1. Touch Sensor Operation Interlock ....................................................................................... 64
5-2. Measures against Interference during Execution of the Automatic Tool Length Offset/
Tool Breakage Detection Cycle ........................................................................................... 64
6. Variables Used in Subprograms .................................................................................................66
6-1. Table of Subprograms and Variables .................................................................................. 66
6-2. Table of Subprograms and Variables (MCM Horizontal Tools) ........................................... 69
6-3. How to Use Variables .......................................................................................................... 72
7. Cautions on Operation ................................................................................................................ 80
8. Program Examples ..................................................................................................................... 82
8-1. Automatic Tool Length Offset .............................................................................................. 82
Page 8
4297-E P-(ii)
TABLE OF CONTENTS
8-2. Automatic Tool Breakage Detection .................................................................................... 84
9. Alarm List.................................................................................................................................... 87
SECTION 2 AUTOMATIC GAUGING FUNCTION ........................................................94
1. Overview ..................................................................................................................................... 94
1-1. Dimension Check Function.................................................................................................. 94
1-2. Automatic Zero Offset Function........................................................................................... 94
2. Operation of the Automatic Gauging Function............................................................................ 95
2-1. Setting the Datum Hole Zero Point...................................................................................... 96
2-2. Touch Probe Radius Compensation.................................................................................... 98
2-3. Touch Probe Length Offset ............................................................................................... 103
2-4. Inner Diameter (ID) Gauging Function .............................................................................. 105
2-5. Outer Diameter (OD) Gauging Function ............................................................................ 107
2-6. End Face Gauging Cycle................................................................................................... 110
2-7. Saving of Gauging Cycle Results ...................................................................................... 115
2-8. Calculating the Center and Distance between Two Points................................................ 116
2-9. Calculating the Center and Distance between Two End Faces ........................................ 118
2-10.Automatic Zero Offset Function........................................................................................ 121
2-11.Copying the Touch Probe Offset Data.............................................................................. 122
3. Automatic Gauging Function for B-/C-axis, 90° Angular and
Extension Attachments (Option) ............................................................................................... 123
3-1. Automatic Gauging for 90° Angular Attachment and B-/C-axis Attachment (PAB=90°)... 125
3-2. Automatic Gauging for Extension Attachment and B-/C-axis Attachment (PAB=0°)......... 126
4. Power ON/OFF Cycle of Renishaw's Optical Touch Probe (MP7/MP9/MP10) ....................... 127
4-1. Power ON/OFF Cycle Commands .................................................................................... 127
4-2. Power ON/OFF Cycle Operation ....................................................................................... 128
5. Details ....................................................................................................................................... 130
5-1. Touch Probe Movements .................................................................................................. 130
5-2. Approach Speed to the Workpiece .................................................................................... 133
5-3. Variables Used in Subprograms ........................................................................................ 135
6. Touch Probe Safety Measures ................................................................................................. 147
6-1. Checking Proximity Switch Operation ............................................................................... 147
6-2. Replacing the Touch Probe Battery................................................................................... 148
7. Supplementary Information....................................................................................................... 149
8. Program Examples ................................................................................................................... 151
8-1. ID Gauging ........................................................................................................................ 151
8-2. OD Gauging....................................................................................................................... 152
8-3. End Face Gauging on Z-axis............................................................................................. 153
8-4. Distance between End Faces (X-axis direction) ................................................................ 154
8-5. Automatic Zero Offset........................................................................................................ 155
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4297-E P-(iii)
TABLE OF CONTENTS
8-6. Example Program for MCM Horizontal Spindle ................................................................. 156
9. Examples of Gauging Result Display ....................................................................................... 159
10.Alarm List .................................................................................................................................. 162
10-1.Alarm List.......................................................................................................................... 162
10-2.Gauging Impossible Cause Code Chart (Alarm B 2305) ................................................. 164
SECTION 3 GAUGING DATA OUTPUT FUNCTION ..................................................170
1. Overview ................................................................................................................................... 170
1-1. Parameters ........................................................................................................................ 170
1-2. Output Operation ............................................................................................................... 171
1-3. Example Program .............................................................................................................. 172
1-4. Example of Outputs ........................................................................................................... 173
1-5. Output Items ...................................................................................................................... 174
2. Interface Specifications for Connecting VP-600 ....................................................................... 175
2-1. Connection Diagram ..........................................................................................................175
2-2. Parameters ........................................................................................................................ 176
SECTION 4 GAUGING DATA OUTPUT TO FILE .......................................................177
1. Outline ...................................................................................................................................... 177
2. Parameters ............................................................................................................................... 177
2-1. NC Optional Parameter Bit ................................................................................................ 177
3. Designation of Displaying Device ............................................................................................. 178
4. Print Command......................................................................................................................... 178
4-1. System Variables for Printing ............................................................................................ 179
SECTION 5 MANUAL GAUGING ................................................................................181
1. Overview ................................................................................................................................... 181
1-1. Specifications .................................................................................................................... 181
1-2. Overview of Manual Gauging Functions............................................................................ 182
1-3. List of Display Screens ...................................................................................................... 186
2. Basic Operation ........................................................................................................................ 187
3. Preparation for Gauging ........................................................................................................... 188
3-1. Preparation for Work Gauging/Tool Length Gauging Cycles ............................................ 188
3-2. Preparation for Cutter Radius Compensation Cycle.......................................................... 195
4. Work Gauging........................................................................................................................... 197
4-1. End Face Gauging (X, Y, Z) .............................................................................................. 197
4-2. I.D. Center Gauging........................................................................................................... 202
4-3. O.D. Center Gauging .........................................................................................................207
4-4. Internal Faces Center Gauging ......................................................................................... 213
4-5. External Faces Center Gauging ........................................................................................ 225
Page 10
4297-E P-(iv)
TABLE OF CONTENTS
4-6. Inclination and Corner Gauging ......................................................................................... 237
5. Tool Length Gauging ................................................................................................................ 244
6. Cutter Radius Gauging ............................................................................................................. 247
7. Comparison and Calculation of Gauging Results ..................................................................... 250
7-1. Transferring Gauging Results............................................................................................ 250
7-2. Comparison with Gauging Data......................................................................................... 252
7-3. Example of Calculation Results Display ............................................................................ 252
8. Error List ................................................................................................................................... 255
SECTION 6 INTERACTIVE GAUGING FUNCTION....................................................257
1. Specifications............................................................................................................................ 257
2. List of Display Screen ............................................................................................................... 258
3. Switches ................................................................................................................................... 259
3-1. Main Operation Panel ........................................................................................................259
3-2. Interactive Gauging Operation Panel ................................................................................ 261
4. Terminology .............................................................................................................................. 262
5. Basic Operation ........................................................................................................................ 264
6. Outline of Interactive Gauging Function ................................................................................... 265
7. Work Gauging Function ............................................................................................................ 271
7-1. PARAMETER (WORK) Screen ......................................................................................... 271
7-2. PREPARATION (WORK) Screen...................................................................................... 272
7-3. X, Y, Z END FACE ............................................................................................................278
7-4. I.D. CENTER ..................................................................................................................... 282
7-5. O.D. CENTER ................................................................................................................... 285
7-6. INT END CENTER ............................................................................................................ 287
7-7. EXT END CENTER ........................................................................................................... 290
7-8. INCLINE, CORNER ........................................................................................................... 293
8. Tool Length Gauging ................................................................................................................ 296
8-1. Parameter (Tool Length) ................................................................................................... 296
8-2. Preparation (Tool Length).................................................................................................. 297
8-3. Tool Length Gauging .........................................................................................................300
9. Other Supplementary Explanations .......................................................................................... 303
10.Operation Flow ......................................................................................................................... 305
11.Error List ................................................................................................................................... 306
SECTION 7 NON-CONTACT SENSOR CALCULATION FUNCTION.........................308
1. What is Non-contact Sensor? ...................................................................................................308
2. Outline ...................................................................................................................................... 309
3. Maker's Subprogram in the Movable Sensor Mode .................................................................. 310
4. Maker's Subprogram in the Fixed Sensor Mode....................................................................... 330
Page 11
4297-E P-(v)
TABLE OF CONTENTS
5. Maker's Subprogram for Gauging a Vertical Spindle Tool in the Fixed Sensor Mode.............. 331
6. Maker's Subprogram for Gauging a Horizontal Spindle Tool in the Fixed Sensor Mode.......... 345
7. List of Alarms ............................................................................................................................ 359
SECTION 8 NON-CONTACT SENSOR GAUGING FUNCTION FOR
HORIZONTAL MC ...................................................................................360
1. What is Non-contact Sensor? ...................................................................................................360
2. Outline ...................................................................................................................................... 361
3. Gauging with the Fixed Sensor.................................................................................................361
4. Each Manufacturer's Subprogram for the Fixed Sensor ........................................................... 362
5. List of Alarms ............................................................................................................................ 380
SECTION 9 SPECIAL BARRIER FUNCTION FOR HORIZONTAL MC......................381
1. Outline ...................................................................................................................................... 381
2. Detailed Specifications ............................................................................................................. 381
2-1. Parameter Setting.............................................................................................................. 381
2-2. Setting Items...................................................................................................................... 382
2-3. Barrier Range Setting Example ......................................................................................... 383
2-4. Barrier Alarm and Resetting Method ................................................................................. 383
3. Alarms....................................................................................................................................... 384
3-1. Alarm A.............................................................................................................................. 384
SECTION 10NON-CONTACT SENSOR GAUGING FUNCTION FOR MCR-AF.........385
1. What is Non-contact Sensor? ...................................................................................................385
2. Outline ...................................................................................................................................... 386
3. Manufacturer's Subprogram for the Fixed Sensor .................................................................... 387
4. Manufacturer's Subprogram for Gauging Vertical Spindle Tools with the Fixed Sensor .......... 387
5. List of Alarms ............................................................................................................................ 406
SECTION 11NON-CONTACT SENSOR GAUGING FUNCTION FOR 30°/45° AT
(103 VERSIONS) .....................................................................................407
1. What is Non-contact Sensor? ...................................................................................................407
2. Outline ...................................................................................................................................... 408
3. Manufacturer's Subprogram for the Fixed Sensor .................................................................... 409
4. Manufacturer's Subprogram for 30°/45° AT Tool Gauging by the Fixed Sensor ...................... 410
5. List of Alarms ............................................................................................................................ 428
Page 12
SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/
AUTOMATIC TOOL BREAKAGE DETEC­TION FUNCTION

1. Overview

4297-E P-1
The automatic tool length offset/automatic tool breakage detection function automatically calculates the tool offset data and detects breakage (chipping) of tools such as drills, taps, reamers and boring bars. The specifications of this function are classified into the following two types.
• Specifications for automatic tool length offset only, and
• Specifications for automatic tool length offset and automatic tool breakage detection
A touch sensor is mounted in the machine: a tool mounted in the spindle is brought into contact with this touch sensor to determine the tool offset data and to detect if the tool has been broken. For tools which are mounted and removed without using the ATC, refer to the section Tool Manage­ment Function in the special specifications of the Operation Manual.
(1) Automatic Tool Length Offset
With the tool length offset function, the tool mounted in the spindle is brought into contact with the touch sensor to calculate the tool length. A subprogram prepared for this purpose is used for this operation.
(2) Automatic Tool Breakage Detection
With the automatic tool breakage detection function, the same contact detection cycle as used for the tool length offset function is executed to obtain the tool length. The function compares the obtained tool length with the tool length offset data stored in the CNC memory to judge if the tool has been broken. If the tool is found to have been broken, it is replaced with a spare tool.
Eeoemr5s1001
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SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION

1-1. Displaying the Result of Gauging

4297-E P-2
Display the screen that displays the gauging result (GAUGING RESULTS screen) by following the steps indicated below.
Procedure :
1 Select an operation mode (automatic, MDI, manual).
2 Press function key [F8] (DISPLAY CHANGE).
The DISPLAY CHANGE window opens.
3 In the DISPLAY CHANGE window, select “GAUGING RESULTS”.
4 Press function key [F8] (CLOSE).
The GAUGING RESULTS screen, shown below, is displayed.
Eeoemr5s1004
EIOEMR5S1001R01
Page 14
SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION

1-2. Function Menu

4297-E P-3
The function menu switches as shown below to display the functions relating to the gauging result
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when the extend key, to the right of function key [F8] (DISPLAY CHANGE), is pressed.
EIOEMR5S1002R01
When the extend key is pressed.
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The function menu relating to gauging result processing is described below.
Function Menu Description
TOOL/ZERO Displays the presently set zero offset/tool offset number.
MSB ZERO ON/OFF Displays the offset data presently set for the individual zero offset num-
bers.
MSB TOOL ON/OFF Displays the offset data presently set for the tool length offset number
and the cutter diameter offset number.
SENSstat ON/OFF Displays the value set for system variable VNCOM and the sensor con-
tact status.
VARIOUS ON/OFF Displays the values set for the system variables.
For details on the function keys, refer to [1-2-1. TOOL/ZERO Function Key] to [1-2-5. VARIOUS ON/ OFF Function Key].
Page 15
SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
1-2-1. TOOL/ZERO Function Key
4297-E P-4
The TOOL/ZERO pop-up window displays the presently set zero offset number and tool offset num­bers. To display the TOOL/ZERO pop-up window, follow the procedure indicated below.
Procedure :
1 Display the GAUGING RESULTS screen.
For the procedure used to display the GAUGING RESULTS screen, refer to [1-1. Displaying the Result of Gauging].
2 Press the extend key to switch the function menu.
3 Press function key [F2] (TOOL/ZERO).
The TOOL/ZERO pop-up window opens.
Eeoemr5s1006
EIOEMR5S1004R01
The TOOL/ZERO pop-up window closes when function key [F2] (TOOL/ZERO) is pressed again.
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SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
1-2-2. MSB ZERO ON/OFF Function Key
4297-E P-5
The MSB (VSZO✽[N]) pop-up window displays the offset data set for the individual zero offset num­bers. To display the MSB (VSZO✽[N]) pop-up window, follow the procedure indicated below.
Procedure :
1 Display the GAUGING RESULTS screen.
For the procedure used to display the GAUGING RESULTS screen, refer to [1-1. Displaying the Result of Gauging].
2 Press the extend key to switch the function menu.
3 Press function key [F4] (MSB ZERO ON/OFF).
The MSB (VSZO✽[N]) pop-up window opens.
Eeoemr5s1007
EIOEMR5S1005R01
The MSB (VSZO✽[N]) pop-up window closes when function key [F4] (MSB ZERO ON/OFF) is pressed again.
Page 17
SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
1-2-3. MSB TOOL ON/OFF Function Key
4297-E P-6
The TOOL OFFSET/COMPENSATION pop-up window displays the offset data set for the individual tool length offset and cutter radius compensation numbers. To display the TOOL OFFSET/COM­PENSATION pop-up window, follow the procedure indicated below.
Procedure :
1 Display the GAUGING RESULTS screen.
For the procedure used to display the GAUGING RESULTS screen, refer to [1-1. Displaying the Result of Gauging].
2 Press the extend key to switch the function menu.
3 Press function key [F5] (MSB TOOL ON/OFF).
The MSB TOOL LENGTH OFFSET (VSTOH[N])/MSB CUTR RADIUS COMP (VSTOD[N]) pop-up window opens.
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EIOEMR5S1006R01
The MSB TOOL LENGTH OFFSET (VSTOH[N])/MSB CUTR RADIUS COMP (VSTOD[N]) pop-up window closes when function key [F5] (MSB TOOL ON/OFF) is pressed again.
Page 18
SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
1-2-4. SENSstat ON/OFF Function Key
4297-E P-7
The NC COMMUNICATION (VNCOM[N]) pop-up window displays the values set for system vari­ables VNCOM and the contact status of the sensor. To display the NC COMMUNICATION (VNCOM[N]) pop-up window, follow the procedure indicated below.
Procedure :
1 Display the GAUGING RESULTS screen.
For the procedure used to display the GAUGING RESULTS screen, refer to [1-1. Displaying the Result of Gauging].
2 Press the extend key to switch the function menu.
3 Press function key [F6] (SENSstat ON/OFF).
The NC COMMUNICATION (VNCOM[N]) pop-up window opens.
Eeoemr5s1009
EIOEMR5S1007R01
The NC COMMUNICATION (VNCOM[N]) pop-up window closes when function key [F6] (SENSstat ON/OFF) is pressed again.
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SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
1-2-5. VARIOUS ON/OFF Function Key
4297-E P-8
The VARIOUS DATA pop-up window displays the values set for the individual system variables. To display the VARIOUS DATA pop-up window, follow the procedure indicated below.
Procedure :
1 Display the GAUGING RESULTS screen.
For the procedure used to display the GAUGING RESULTS screen, refer to [1-1. Displaying the Result of Gauging].
2 Press the extend key to switch the function menu.
3 Press function key [F7] (VARIOUS ON/OFF).
The VARIOUS DATA pop-up window opens.
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EIOEMR5S1010R01
The VARIOUS DATA pop-up window closes when function key [F7] (VARIOUS ON/OFF) is pressed again.
Page 20
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SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION

2. Automatic Tool Length Offset/Automatic Tool Breakage Detection Operation

A general breakdown of the operational procedure for carrying out automatic tool length and tool breakage detection functions is given below.
Setting the zero point for the
touch sensor
Setting the correspondence
between pot numbers/tool
numbers
Executing the automatic tool
length offset cycle with the tool
used for setting the touch
sensor zero point
Executing automatic tool length
offset for other tools
Setting the tool change
position data
Zero point setting is necessary only when the machine is installed. (If higher gauging accuracy is required, however, you are recommended to set the zero point occasionally.)
When tools in the magazine are replaced, it is neces­sary to set the new correspondence between the tool pot numbers and the tool numbers.
Make sure that the tool length offset value is "0±0.005 mm" or "PLI setting±0.005mm".
Call the tool whose tool length offset data is to be set from the magazine and mount it in the spindle, then execute the automatic tool length offset cycle. Repeat this operation for all tools that require tool length offset data setting.
This step is not necessary for MC-H.
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Tool not
broken
Usually, the tool breakage detection cycle is exe-
Executing automatic tool breakage detection cycle
Checking for breakage
Tool broken
Pallet change, etc.
[Supplement]
With a double-column machining center that has a touch sensor at a location other than the cross­rail (on the table, for example), the Z-axis zero point must be set after positioning the crossrail.
cuted after each cutting operation with the relevant tool is completed. Tool length offset data must be set for tools that are checked for breakage.
The function determines whether the machining is continued as programmed or error processing is exe­cuted according to the result of the automatic tool breakage detection cycle. This step is not necessary if the setting that specifies the machine should stop in the alarm stop state when tool breakage is detected is made.
When the setting that specifies automatic selection of a spare tool if tool breakage is detected is made, the error processing on occurrence of tool breakage should be as follows: the CNC judges that the work­piece machined using the broken tool is defective, changes the pallet to a new one and starts machining for a new workpiece.
EIOEMR5S1009R01
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SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION

2-1. Setting the Touch Sensor Zero Point

2-1-1. Setting the Touch Sensor Zero Point (Z-axis)
4297-E P-10
Set the Z-axis direction offset value of the touch sensor zero point using a reference tool so that the automatic tool length offset/automatic tool breakage detection function operates correctly.
Eeoemr5s1012
NOTICE
If Y-axis has to be retracted to set the touch sensor zero point, set the Y-axis retraction position first by referring to [4. Y-axis Escape Position (MCM-B/MCR-B II/MCR-A/VH-40)].
Procedure :
1 After selecting the MDI mode, input “VFST=✽✽”, press the CYCLE START button.
Set an appropriate value for "✽✽" by referring to [2-3. Operation Mode Designation]. In this set­ting, either the automatic tool length offset mode or the automatic tool breakage detection cycle may be selected. The set value can be confirmed by opening the VARIOUS DATA pop-up window on the GAUG­ING RESULTS screen.
EIOEMR5S1010R01
For the procedure for opening the VARIOUS DATA pop-up window, refer to [1-2-5. VARIOUS ON/OFF Function Key].
2 Execute the sensor advance command M144 in the MDI mode. (In the case of a movable type
sensor)
3 Set the reference tool in the spindle, and manually bring the nose of the reference tool near the
Z-axis touch sensor. There will inevitably be some slight displacement between the center of the sensor and the center of the reference tool. This displacement, however, does not pose a problem for the suc­ceeding operation.
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4297-E P-11
SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
[Supplement]
The “reference tool” means the tool used for setting the zero point in a work coordinate sys­tem.
4 At this position, execute the following program after selecting the automatic mode.
CALL OO30 PAXI=7 PLI=✽✽ (VFST=✽✽) M02
[Supplement]
The settings for PLI should be as indicated below
Offset Type PLl Setting
Relative offset type 0
Absolute offset type Length from the spindle nose
face
Usually, the tool used for zero setting of the work coordinate system is also used for the sensor zero point setting cycle. Therefore, there is no tool length difference between the tools used for the two different zero point setting cycles, and the setting for PLI should be “zero” (PLI = 0). For the absolute offset type, set the accurate length of the tool currently set in the spindle as illustrated to the left. If no value is set for PLI, either “PLI = 150 mm.” or “PLI = 200 mm” is assumed. Which of the values is used is determined by the machine model.
Relative offset type
PLI = 0
Absolute offset type
PLI
EIOEMR5S1011R01
[Supplement]
VFST may be set in this step instead of setting it first in the MDI mode. As the program above is executed, the reference tool automatically comes into contact with the Z-axis touch sensor, whereupon Z-axis zero offset is executed. Zero offset of both the X and Y axes is executed so that the present (actual) position of the ref­erence tool becomes X = 0, Y = 0. How the reference tool moves during the execution of the program is explained in [2-1-2. Ref­erence Tool Movements during Z-axis Touch Sensor Zero Point Setting].
Page 23
4297-E P-12
SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
5 Execute the sensor advance command M144 in the MDI mode. (In the case of a movable type
sensor)
6 Mount a small-diameter drill in the spindle.
7 Bring the drill tip manually near to the touch sensor and align the spindle center (drill center)
with the center of the touch sensor.
8 At this position, execute the following program after selecting the automatic mode.
CALL OO30 PAXI=3 M02 X- and Y-axis zero offset is executed so that the present (actual) position of the drill becomes X = 0, Y = 0. (The Z-axis does not move.) After the execution of the X- and Y-axis zero offset, the Z-axis moves at a rapid feedrate to the travel end in the positive (+) direction and the sensor retracts, completing touch sensor zero point setting. The result is fed back to the offset data of system work coordinate system No. 1. The set offset data can be checked by opening the MSB ZERO OFFSET (VSZO✽[N]) pop-up window on the GAUGING RESULTS screen. The offset data of the X-, Y- and Z-axis is dis­played at the X, Y, and Z columns of the NO. 1 line
EIOEMR5S1012R01
[Supplement]
Since system work coordinate system No. 1 is used exclusively for the automatic tool length offset and automatic tool breakage detection functions, it cannot normally be set or refer­enced. For the procedure for opening the MSB ZERO OFFSET (VSZO✽[N]) pop-up window, refer to [1-2-2. MSB ZERO ON/OFF Function Key].
This completes the Z-axis touch sensor zero point setting.
Page 24
4297-E P-13
SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
2-1-2. Reference Tool Movements during Z-axis Touch Sensor Zero Point Setting
During the execution of the Z-axis touch sensor zero point setting, the reference tool moves as indi­cated below.
Machine operation
(1) The Z-axis moves at a rapid feedrate to the travel end in the positive (+) direction.
(2) The spindle is oriented.
(3) If the movable type sensor is used, the sensor moves back once and then moves forward.
(4) The Z-axis moves at an approach feedrate in the negative (-) direction until the reference tool
comes into contact with the touch sensor.
(5) The Z-axis comes to a stop when the reference tool comes into contact with the touch sensor.
(6) The Z-axis moves at a rapid feedrate to the travel end in the positive (+) direction.
(7) If the movable type sensor is used, the sensor moves back.
2-1-3. Setting the Touch Sensor Zero Point (Y-axis)
When the specifications for automatic tool length offset and automatic breakage detection in the Y­axis direction (diameter direction) are selected, set the Y-axis touch sensor zero point retraction position first by referring to [2-4. Automatic Tool Length Offset Function].
Procedure :
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Eeoemr5s1014
1 After selecting the MDI mode, input “VFST=✽✽”, and press the CYCLE START button.
Set an appropriate value for "✽✽" by referring to [2-3. Operation Mode Designation]. In this set­ting, either the automatic tool length offset mode or the automatic tool breakage detection cycle may be selected. If an appropriate value is already set for VFST, it is not necessary to set the value here. The set value can be confirmed by opening the VARIOUS DATA pop-up window on the GAUG­ING RESULTS screen. For the procedure for opening the VARIOUS DATA pop-up window, refer to [1-2-5. VARIOUS ON/OFF Function Key].
2 Execute the sensor advance command M144 in the MDI mode. (In the case of a movable type
sensor)
3 Set the reference tool in the spindle, and manually bring the nose of the reference tool near the
Y-axis touch sensor. Align the center of the reference tool with the center of the Y-axis touch sensor.
4 At this position, execute the following program after selecting the automatic mode.
CALL OO30 PAXI=#17H PLI=0(or accurate length of reference tool)
PY=Accurate radius of reference tool (VFST=**)
M02
EIOEMR5S1013R01
In actual programming, the three lines of program above are expressed in one line as indicated below.
Page 25
4297-E P-14
SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
[Example]
CALL OO30 PAXI=#17H PLI=0 PY=10 (VFST=1)
φ or accurate length of reference tool Accurate radius of reference tool
EIOEMR5S1014R01
[Supplement]
1) When setting PLI, pay attention to the same point as explained in [2-1-1. Setting the Touch Sen-
sor Zero Point (Z-axis)].
2) Always set PY. If it is not set, “PY = 0” is assumed.
3) VFST may be set in this step instead of setting it first in the MDI mode.
As the program above is executed, the reference tool automatically comes into contact with the Y-axis touch sensor, whereupon Y-axis zero offset is executed. Zero offset of both the Z and X axes is executed at the same time. How the reference tool moves during the execution of the program is explained in [2-1-4. Refer­ence Tool Movements during Y-axis Touch Sensor Zero Point Setting]. The result is fed back to the offset data of system work coordinate system No. 4. The set offset data can be checked by opening the MSB ZERO OFFSET (VSZO✽[N]) pop-up window on the GAUGING RESULTS screen. The offset data of the X-, Y- and Z-axis is dis­played at the X, Y, and Z columns, respectively.
[Supplement]
Since system work coordinate system No. 4 is used exclusively for the automatic tool length offset and automatic tool breakage detection functions, it cannot normally be set nor referenced.
For the procedure for opening the MSB ZERO OFFSET (VSZO✽[N]) pop-up window, refer to [1-2-2. MSB ZERO ON/OFF Function Key]. This completes the Y-axis touch sensor zero point setting.
2-1-4. Reference Tool Movements during Y-axis Touch Sensor Zero Point Setting
During the execution of the Y-axis touch sensor zero point setting, the reference tool moves as indi­cated below.
Machine operation
(1) The Z-axis moves at a rapid feedrate to the travel end in the positive (+) direction.
(2) The spindle is oriented.
(3) If the movable type sensor is used, the sensor moves back once and then moves forward.
(4) The Z-axis moves to the Y-axis touch sensor position (the position where the Z-axis was first
moved manually).
(5) The Y-axis moves at an approach feedrate until the reference tool comes into contact with the
touch sensor.
(6) The Y-axis comes to a stop when the reference tool comes into contact with the touch sensor.
Eeoemr5s1015
(7) The Y-axis moves at a rapid feedrate to the approach start position.
(8) The Z-axis moves at a rapid feedrate to the travel end in the positive (+) direction.
(9) If the movable type sensor is used, the sensor moves back.
Page 26
SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION

2-2. Setting the Tool Pot No./Tool No. Table

4297-E P-15
Set the correspondence between tool numbers and tool pot numbers in the tool pot number - tool number correspondence table. The table setting shown below uses a machine with 10-tool capacity magazine as an example.
Magazine capacity: 10 tools
Eeoemr5s1016
Assign a tool number to each tool.
The total number of tools user for cutting the various types of workpieces is 300.
Correspondence Table
Toolpot Number
1
2
3
4
5
6
7
8
9
10
Tool Number
1
2
3
20
30
31
32
105
270
271
Write the correspondence between the tool number and the pot number on the screen when tools in the magazine are to be changed for new setup.
The memory of the OSP can hold the life expectancy data of up to 300 tools.
Max. tool number: Standard 50 Option 300
EIOEMR5S1015R01
The tool offset data obtained by the execution of an automatic tool length offset cycle is set for the same offset number as the tool number of the tool presently being used (active tool).Similarly, the tool offset number referred to and compared when the automatic tool breakage detection cycle is executed is the same offset number as the tool number of the active tool.
[Supplement]
To automatically change a tool for a spare tool, tools must be registered in a tool group. For the procedure for registering tools in a group, refer to the Tool Management Function section of the special specifications of the Operation Manual.
Page 27
SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION

2-3. Operation Mode Designation

4297-E P-16
The basic operation mode of automatic tool length offset and automatic tool breakage detection is designated by the system variable VFST. Since the system variable VFST is backed up in the CNC memory, it only has to be designated once: it does not have to be set each time the MSB of the automatic tool length offset/automatic tool breakage detection cycle is called. VFST consists of one byte (8 bits) and each bit has the following significance.
VFST
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Bit No Setting Description
Bit 0
Bit 1 1
Bit 2 1
Bit 3 1
Bit 4 0 Always set “0”. Bit 5 0 Always set “0”. Bit 6 0 Always set “0”.
Bit 7
0 Automatic tool breakage detection cycle 1 Automatic tool length offset cycle
Executes the automatic tool length offset/automatic tool breakage detec­tion cycle in the Y-axis direction.
Executes the automatic tool length offset/automatic tool breakage detec­tion cycle in the Y-axis direction after the execution of the automatic tool length offset/automatic tool breakage detection cycle in the Z-axis direc­tion. To execute automatic tool length offset/automatic tool breakage detec­tion cycle only in the Z-axis direction, set “0” for both Bit 1 and Bit 2.
Does not move the X-axis when positioning a reference tool at the touch sensor position. Set “1” for Bit 3 with machine models such as MCV in which the touch sensor is installed independently of the X-axis movement.
Designates the relative offset type.
0
1
The tool length in reference to the reference tool used for zero point set­ting of a work coordinate system is used as the tool length offset data.
Designates the absolute offset type. The length of the tool from the spindle nose surface is regarded as the tool length offset data.
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Page 28
4297-E P-17
SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
An example of VFST settings is given in the following table.
Model
MC-H MC-V
MCV MCR MCM
(Vertical
spindle)
Relative/ Absolute
Offset Type
Relative
offset
Absolute
offset
Relative
offset
Absolute
offset
X-axis
Movement
Yes/No
Yes Only Z-axis offset
Yes Only Z-axis offset
No
No
Z-axis/Y-axis Offset
Only Z-axis offset
Only Y-axis offset
Y-axis offset after Z-
axis offset
Only Z-axis offset
Only Y-axis offset
Y-axis offset after Z-
axis offset
Automatic Tool Length Off-
set/Automatic Tool Break-
age Detection
Automatic tool length offset #01H
Automatic tool breakage
detection
Automatic tool length offset #81H
Automatic tool breakage
detection
Automatic tool length offset #09H
Automatic tool breakage
detection
Automatic tool length offset #0BH
Automatic tool breakage
detection
Automatic tool length offset #0DH
Automatic tool breakage
detection
Automatic tool length offset #89H
Automatic tool breakage
detection
Automatic tool length offset #8BH
Automatic tool breakage
detection
Automatic tool length offset #8DH
Automatic tool breakage
detection
VFST Value
#00H
#80H
#08H
#0AH
#0CH
#88H
#8AH
#8CH
[Supplement]
Refer to [3-1. Automatic Tool Length Offset/Automatic Tool Breakage Detection Function for Hori­zontal Tools of MCM] for details of automatic tool length offset/automatic tool breakage detection for the horizontal tools of MCM horizontal.
Page 29
SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION

2-4. Automatic Tool Length Offset Function

4297-E P-18
The automatic tool length offset function automatically corrects the tool length according to the off­set data set using the reference tool.
2-4-1. Z-axis Automatic Tool Length Offset
Automatic tool length offset in the Z-axis direction is executed in the manner indicated below.
NOTICE
Make sure that the zero point of the Z-axis touch sensor has been set before executing Z-axis automatic tool length offset. Never execute Z-axis automatic tool length offset when the Z-axis touch sensor zero point has not been set.
Procedure :
1 After selecting the MDI mode, input “VFST=✽✽”, and press the CYCLE START button.
Set an appropriate value for "✽✽" by referring to [2-3. Operation Mode Designation]. The set value can be confirmed by opening the VARIOUS DATA pop-up window on the GAUG­ING RESULTS screen. Refer to [1-2-5. VARIOUS ON/OFF Function Key].
2 Mount the tool for which automatic tool length offset is to be executed in the spindle.
When the tool is mounted in the spindle manually, make sure that the active tool number dis­played on the ATC TOOL DISPLAY (MEMORY RANDOM) screen (for the ATC memory random specification) or the POT NO./TOOL NO. TABLE (FIXED ADDRESS) screen (for the ATC fixed address specification) agrees with the tool number of the tool mounted in the spindle. This operation is not necessary when the tool is mounted in the spindle by executing the M06 command, either in automatic or MDI operation.
Eeoemr5s1018
Eeoemr5s1019
3 Execute the following program after selecting the automatic mode.
CALL OO30 (VFST=✽✽) (PLI = Anticipated tool length) M02 When the program is executed, the tool is automatically brought into contact with the Z-axis touch sensor and the tool length offset data is calculated and stored in the CNC memory. The set tool length offset data can be checked by displaying the TOOL LENGTH OFFSET/ CUTTER RADIUS COMPENSATION screen of the TOOL DATA screen.
Page 30
4297-E P-19
SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
The obtained results are also displayed on the GAUGING RESULTS screen
EIOEMR5S1017R01
This ends the Z-axis automatic tool length offset processing.
[Supplement]
1) VFST may be set in this step instead of setting it first in the MDI mode.
2) Set the anticipated tool length for PLI. If no value is set for PLI, the value set for CNC optional parameter (long word) No. 43 (distance
from the spindle gauge line) is automatically set as the anticipated tool length.
Machine operation
During the execution of the Z-axis automatic tool length offset, the tool moves as indicated below.
(1) The Z-axis moves at a rapid feedrate to the travel end in the positive (+) direction.
(2) The spindle is oriented.
(3) The X- and Y-axis move at a rapid feedrate to align the tool nose with the center of the touch
sensor. For tools whose nose is not at the center of the spindle, refer to items (6) PX and (7) PY in [6-3. Explanation of Variables].
(4) The Z-axis moves at a fast approach feedrate until the tool comes into contact with the touch
sensor.
(5) The Z-axis comes to a stop when the reference tool comes into contact with the touch sensor.
(6) The Z-axis moves back several millimeters at a rapid feedrate.
(7) The Z-axis moves at an approach feedrate until the tool comes into contact with the touch sen-
sor again.
(8) The Z-axis comes to a stop when the reference tool comes into contact with the touch sensor.
The result of gauging is stored under the same tool length offset number as the tool number of the active tool.
(9) The Z-axis moves at a rapid feedrate to the travel end in the positive (+) direction.
Page 31
SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
2-4-2. Y-axis Automatic Tool Length Offset
4297-E P-20
Automatic tool length offset in the Z-axis direction is executed in the manner indicated below.
Eeoemr5s1021
NOTICE
1) Make sure that the zero point of the Z-axis and Y-axis touch sensors has been set before exe­cuting Y-axis automatic tool length offset. Never execute Y-axis automatic tool length offset when the touch sensor zero point has not been set.
2) Before executing automatic tool length offset in the Y-axis direction, set the Z-axis tool length offset data of the tools.
The Z-axis tool length offset data can be set either by executing the Z-axis automatic tool length offset or by inputting an appropriate value at the TOOL DATA screen.
Procedure :
1 After selecting the MDI mode, input “VFST=✽✽”, and press the CYCLE START button.
Set an appropriate value for "✽✽" by referring to [2-3. Operation Mode Designation]. The set value can be confirmed by opening the VARIOUS DATA pop-up window on the GAUG­ING RESULTS screen. Refer to [1-2-5. VARIOUS ON/OFF Function Key].
2 Mount the tool for which Y-axis automatic tool length offset is to be executed in the spindle.
When the tool is mounted in the spindle manually, make sure that the active tool number dis­played on the ATC TOOL DISPLAY (MEMORY RANDOM) screen (for the ATC memory random specification) or the POT NO./TOOL NO. TABLE (FIXED ADDRESS) screen (for the ATC fixed address specification) agrees with the tool number of spindle mounted tool. This operation is not necessary when the tool is mounted in the spindle by executing the M06 command either in automatic or MDI operation.
3 Execute the following program after selecting the automatic mode.
CALL OO30 PY= Anticipated cutter radius(VFST=✽✽) M02 When the program is executed, the tool is automatically brought into contact with the Y-axis touch sensor and the cutter radius compensation data is calculated and stored in the CNC memory. The set cutter radius compensation data can be checked by displaying the TOOL LENGTH OFFSET/CUTTER RADIUS COMPENSATION screen of the TOOL DATA screen. The obtained results are also displayed at the GAUGING RESULTS screen. This ends the Y-axis automatic tool length offset processing.
[Supplement]
VFST may be set in this step instead of setting it first in the MDI mode.
Page 32
SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
Machine operation
During the execution of the Y-axis automatic tool length offset, the tool moves as indicated below.
(1) The Z-axis moves at a rapid feedrate to the travel end in the positive (+) direction.
(2) The spindle is oriented.
(3) The X- and Y-axis move at a rapid feedrate to align the tool nose with the center of the Z-axis
touch sensor.
(4) The Z-axis moves at a fast approach feedrate to align the tool nose with the center of the Y-axis
touch sensor.
(5) The Y-axis moves at an approach feedrate until the tool comes into contact with the Y-axis touch
sensor.
(6) The Y-axis comes to a stop when the tool comes into contact with the touch sensor.
The result of gauging is stored under the same cutter radius compensation number as the tool number of the active tool.
(7) The Y-axis returns at a rapid feedrate.
(8) The Z-axis moves at a rapid feedrate to the travel end in the positive (+) direction.
2-4-3. Continuous Z-axis and Y-axis Automatic Tool Length Offset
4297-E P-21
To execute automatic tool length offset on the Z-axis and the Y-axis continuously, follow the proce­dure indicated below. For points of caution and details of the tool length offset, refer to [2-4-1. Z-axis Automatic Tool Length Offset] and [2-4-2. Y-axis Automatic Tool Length Offset].
Procedure :
1 After selecting the MDI mode, input “VFST=✽✽”, and press the CYCLE START button.
2 Execute the following program after selecting the automatic mode.
CALL OO30 PY= Anticipated cutter radius (PLI = Anticipated tool length) (VFST=✽✽) M02 The tool is first brought into contact with the Z-axis touch sensor then the Y-axis touch sensor. This ends the continuous Z-axis and Y-axis automatic tool length offset processing.
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SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION

2-5. Setting the Tool Change Position (Other Than MC-H)

4297-E P-22
When a tool is found to be broken in the automatic tool breakage detection cycle, the broken tool can be automatically returned to the magazine by using a subprogram. In order to execute this automatic tool return cycle, the tool change position must be set for MC-V and double-column machining centers since these types of machining centers do not have a preset ATC home position like MC-H. If the tool change position is not set for these types of machining centers, the tool change will be car­ried out just above the touch sensor. Since this may cause problems with some kinds of work­pieces, it is necessary to set the tool change position for MC-V and double-column machining centers.
Procedure :
1 Move the spindle to the desired tool change position.
Note that X- and Y-axis must be positioned at the desired tool change position. Positioning of the Z-axis is not necessary.
2 At this position, execute the following program after selecting the automatic mode.
CALL OO31 M02 The axes will not move at all even when a program is executed. The set tool change position data can be checked by opening the MSB ZERO OFFSET (VSZO✽[N]) pop-up window on the GAUGING RESULTS screen. The tool change position data of the X-, Y- and Z-axis is displayed at the X, Y, and Z columns of the NO. 2 line. This completes the tool change position setting.
Eeoemr5s1024
[Supplement]
Since system work coordinate system No. 2 is used exclusively for the automatic tool length offset and automatic tool breakage detection functions, it cannot normally be set or referenced.
Page 34
SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION

2-6. Automatic Tool Breakage Detection

2-6-1. Z-axis Automatic Tool Breakage Detection
4297-E P-23
Automatic tool breakage detection in the Z-axis direction is executed in the manner indicated below.
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NOTICE
Before executing Z-axis automatic tool breakage detection, make sure that the zero point of the touch sensor and the tool change position have been set.
Procedure :
1 After selecting the MDI mode, input “VFST=✽✽”, and press the CYCLE START button.
Set an appropriate value for "✽✽" by referring to [2-3. Operation Mode Designation].
2 Mount the tool for which automatic tool breakage detection is to be executed in the spindle.
When the tool is mounted in the spindle manually, make sure that the active tool number dis­played on the ATC TOOL DISPLAY (MEMORY RANDOM) screen (for the ATC memory random specification) or the POT NO./TOOL NO. TABLE (FIXED ADDRESS) screen (for the ATC fixed address specification) agrees with the tool number of the tool mounted in the spindle. This operation is not necessary when the tool is mounted in the spindle by executing the M06 command either in automatic or MDI operation.
3 Execute the following program after selecting the automatic mode.
CALL OO30 PLE1 PLE1= Tool breakage judgment value (PGO=✽✽) M02 When the program is executed, the tool is automatically brought into contact with the touch sensor and the tool length is obtained. The obtained tool length is compared to the tool length offset data stored in the CNC memory and a tool breakage alarm occurs if the difference is greater than the value set for PLE1. The tool breakage alarm also occurs if the tool nose fails to contact the touch sensor during the execution of the program. This ends the Z-axis automatic tool breakage detection processing.
[Supplement]
1) VFST may be set in this step instead of setting it first in the MDI mode.
2) To replace a broken tool with a spare tool, PGO must be designated. For details of PGO, refer to item (11) PGO(P GO) in [6-3. How to Use Variables].
Page 35
4297-E P-24
SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
Machine operation
During the execution of the Z-axis automatic tool breakage detection, the tool moves as indicated below.
(1) The Z-axis moves at a rapid feedrate to the travel end in the positive (+) direction.
(2) The spindle is oriented.
(3) The X- and Y-axis move at a rapid feedrate to align the tool nose with the center of the Z-axis
touch sensor. For tools whose nose is not at the center of the spindle, refer to items (6) PX and (7) PY in [6-3. Explanation of Variables].
(4) The Z-axis moves at a fast approach feedrate until the tool nose reaches the position 20 mm
away from the touch sensor.
(5) The Z-axis moves at an approach feedrate to the position 10 mm past the point where the tool
nose would be in contact with the touch sensor.
• If the tool has not been broken or the amount of chipping is smaller than 10 mm:
The tool nose comes into contact with the touch sensor and the Z-axis stops. The tool length is calculated from the coordinate value of the contact position and is stored in the CNC memory temporarily.
• If the tool has been broken (amount of chipping is greater than 10 mm):
The tool nose will not contact the touch sensor.
(6) The Z-axis moves at a rapid feedrate to the travel end in the positive (+) direction.
Page 36
SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
2-6-2. Y-axis Automatic Tool Breakage Detection
4297-E P-25
Automatic tool breakage detection in the Y-axis direction is executed in the manner indicated below.
Eeoemr5s1027
NOTICE
Before executing Z-axis automatic tool breakage detection, make sure that the zero point of the touch sensor has been set.
Procedure :
1 After selecting the MDI mode, input “VFST=✽✽”, and press the CYCLE START button.
Set an appropriate value for "✽✽" by referring to [2-3. Operation Mode Designation].
2 Mount the tool for which automatic tool breakage detection is to be executed in the spindle.
When the tool is mounted to the spindle manually, make sure that the active tool number dis­played on the ATC TOOL DISPLAY (MEMORY RANDOM) screen (for the ATC memory random specification) or the POT NO./TOOL NO. TABLE (FIXED ADDRESS) screen (for the ATC fixed address specification) agrees with the tool number of the tool mounted in the spindle. This operation is not necessary when the tool is mounted in the spindle by executing the M06 command either in automatic or MDI operation.
3 Execute the following program after selecting the automatic mode.
CALL OO30 PLEY=Tool breakage judgment value PY=Anticipated cutter radius (VFST=✽✽) M02 When the program is executed, the tool is automatically brought into contact with the touch sensor and the cutter radius is obtained. The obtained cutter radius is compared to the cutter radius compensation data stored in the CNC memory and a tool breakage alarm occurs if the difference is greater than the value set for PLEY. The tool breakage alarm also occurs if the tool fails to contact the touch sensor during the exe­cution of the program. This ends the Y-axis automatic tool breakage detection processing.
[Supplement]
1) VFST may be set in this step instead of setting it first in the MDI mode.
2) To replace a broken tool with a spare tool, PGO must be designated.
Page 37
4297-E P-26
SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
Machine operation
During the execution of the Y-axis automatic tool breakage detection, the tool moves as indicated below.
(1) The Z-axis moves at a rapid feedrate to the travel end in the positive (+) direction.
(2) The spindle is oriented.
(3) The X- and Y-axis move at a rapid feedrate to align the tool nose with the center of the touch
sensor.
(4) The Z-axis moves at a rapid feedrate to align the tool nose with the center of the Y-axis touch
sensor.
(5) The Y-axis moves at an approach feedrate to the position 10 mm past the point where the tool
nose would be in contact with the touch sensor.
• If the tool has not been broken or amount of chipping is smaller than 10 mm:
The tool nose comes into contact with the touch sensor and the Y-axis stops. The cutter radius is calculated from the coordinate value of the contact position and is stored in the CNC memory temporarily.
• If the tool has been broken (amount of chipping is greater than 10 mm):
The tool nose will not contact the touch sensor.
(6) The Y-axis returns at a rapid feedrate.
(7) The Z-axis moves at a rapid feedrate to the travel end in the positive (+) direction.
2-6-3. Continuous Z-axis and Y-axis Automatic Tool Breakage Detection
To execute automatic tool breakage detection on the Z-axis and the Y-axis continuously, follow the procedure indicated below. For items carefully attended to and details of the tool length offset, refer to [2-6-1. Z-axis Automatic Tool Breakage Detection] and [2-6-2. Y-axis Automatic Tool Breakage Detection].
Procedure :
1 After selecting the MDI mode, input “VFST=✽✽” and press the CYCLE START button.
2 Execute the following program after selecting the automatic mode.
CALL OO30 (VFST=**) PY=Anticipated cutter radius
PLE1=Tool breakage judgment value (Z-axis) PLEY=Tool breakage judgment value (Y-axis)
M02
3 The tool is first brought into contact with the Z-axis touch sensor to check tool breakage in the
Z-axis direction. When tool breakage is not detected in the Z-axis direction, tool breakage in the Y-axis direction is checked.
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SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
2-6-4. Judgment of Tool Breakage
4297-E P-27
When a spare tool is selected in response to the detection of tool breakage, operation does not stop even when the breakage is detected. Therefore, it is necessary to judge the occurrence of tool breakage at the end of the automatic tool breakage detection cycle and branch the program execu­tion in accordance with the result of the judgement.
• It can be judged whether or not the tool is broken by reading system variable VOK1.
VOK1 = 0 Tool is not broken. VOK1 ≠ 0 Tool is broken. VOK1 indicates the result of the previously executed automatic tool breakage detection cycle.
• Another system variable VOK2 is also available for judgement.
VOK2 indicates the result of automatic tool breakage detection cycles executed after clearance to 0 (VOK2 = 0). If tool breakage is detected even once, the value set for VOK2 is “VOK2 ≠ 0”.
• VOK1 and VOK2 are not cleared to 0 when the CNC is reset.
[Supplement]
When tool breakage is detected by the automatic tool breakage detection function, the tool number is registered by the tool management function as that of a broken tool. In order to use the same tool number after taking the necessary measures, such as replacement with a new tool, the registration of the broken tool number must be cleared. Refer to Tool Management Function in special specifications of the Operation Manual for the proce­dure for resetting broken tool registration.
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4297-E P-28
SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
2-7. Cycle Time Reduction for Automatic Tool Length Offset/Automatic
Tool Breakage Detection Cycle
By feeding a tool close to the sensor at a rapid feedrate, it is possible to reduce the cycle time of the automatic tool length offset/automatic tool breakage detection cycle.
Spindle nose face
Tool
G0 (4)
G31F=PF1 G31F2000
To use this function, it is necessary to set the following parameters.
• Optional parameter (bit) No. 36, bit 3:
Default of maximum tool length for automatic tool length offset/tool breakage detection With check mark: Valid Without check mark: Invalid (Initial value)
(5) (6)
Safety distancePUDT
Sensor
Fig.1-1 Cycle Time Reduction Function
Max. tool length
VLTL
Anticipatedtool length
PL1
Eeoemr5s1031
EIOEMR5S1019R01
• Optional parameter (long ward) No. 44: Max. tool length
For this parameter, set the maximum tool length among the tools that will be used. Setting range: 0 to 999 Unit: mm Initial setting: 0
CAUTION
Set an appropriate value for the maximum tool length setting parameter since “0” is set as the initial value.
Page 40
SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
2-7-1. Automatic tool length offset cycle
4297-E P-29
Machine operation
(1) The Z-axis moves at a rapid feedrate to the travel end in the positive (+) direction.
(2) The spindle is oriented.
(3) The X- and Y-axis move at a rapid feedrate to align the tool nose with the center of the touch
sensor.
(4) The Z-axis moves at a rapid feedrate to the point distanced from the touch sensor by “safety dis-
tance (PUDT) + max. tool length (VLTL)”. This operation is or is not executed according to the setting for the parameter.
(5) The Z-axis moves at a skip feedrate, specified by PF1, to the point distanced from the touch
sensor by “anticipated tool length (PLI) + safety distance (PUDT)”. If the PLI command is not specified, the Z-axis moves at a skip feedrate specified by PF1 to the point distanced from the touch sensor by “safety distance (PUDT)”. If the PF1 command is not specified, the Z-axis moves at F2000.
(6) The Z-axis moves at F2000 to the point 10 mm beyond the anticipated contact point.
It stops when the tool comes into contact with the touch sensor.
(7) The Z-axis returns 5 mm from the contact point.
(8) The Z-axis moves at a skip feedrate, specified by PF2, to the point 10 mm beyond the contact
point. It stops when the tool comes into contact with the touch sensor.
(9) The tool length offset data is written to the active tool number or the offset number specified by
the PH command.
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(10) The Z-axis moves at a rapid feedrate to the travel end in the positive (+) direction.
2-7-2. Automatic tool breakage detection cycle
Machine operation
(1) The same operation as steps 1) to 4) of the automatic tool length offset cycle explained above is
executed.
(2) The Z-axis moves at skip feedrate F4000 to the point 5 mm away the anticipated contact point.
(3) The Z-axis moves at skip feedrate F1000 to the point 10 mm beyond the anticipated contact
point. It stops when the tool comes into contact with the touch sensor.
(4) The Z-axis moves at a rapid feedrate to the travel end in the positive (+) direction.
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Page 41
4297-E P-30
SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
2-8. New Cycle Time Reduction Function for Automatic Tool Length
Offset/Automatic Tool Breakage Detection Cycle
By reducing the execution time of the cycle steps that can be reduced in the previous automatic tool length offset/automatic tool breakage detection cycle, the cycle time reduction function is made more powerful. This new cycle time reduction function is usable only in the vertical tool direction.
Eeoemr5s1032
2-8-1. Command Format and Variables of the New Cycle Time Reduction Function
The command format and the variables used by the new cycle time reduction function are described below.
• Command format
The following is an example command to use the cycle time reduction function. CALL OO30 PZRC=1 PSFT=10 POVT=20 PF1=5000 PF2=2000 M02
• Variables
PZRC Used to select the new or conventional cycle time reduction function.
“1” selects the new cycle time reduction function and “0” selects the conventional cycle time reduction function. The default is “0”.
PUDT: Undertravel distance (safety distance)
This defines the point where, during the approach of a cutting tool to the touch sensor, the approach speed is changed from high-speed to low-speed. The dis­tance from the touch sensor to the tool nose is designated. For the automatic tool breakage detection cycle, the default is 5 mm.
POVT: Overtravel distance (sensor breakage prevention distance)
Default is 10 mm.
PFA: Approach speed to undertravel point
For the automatic tool breakage detection cycle, the default is F4000 mm/min.
PF2: Approach speed to overtravel point
For the automatic tool breakage detection cycle, the default is F1000 mm/min.
VMSBU: Setting for CNC optional parameter (bit) No. 36
If the setting for bit 3 of this parameter is “1”, with “0” set for PZRC, the conven­tional cycle time reduction function is selected.
VLTL: Maximum tool length
The value set for CNC optional parameter (long word) No. 44
PSFT: Feedrate shift distance
This defines the point where, during approach of a cutting tool to the touch sensor, the approach speed is changed from a rapid feedrate to high-speed (low-speed if PSFT is not specified). The distance from the touch sensor to the tool nose is designated. The default is 5 mm.
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SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
2-8-2. Tool Movements of New Cycle Time Reduction Function
4297-E P-31
During the execution of the new cycle time reduction function, the tool moves as indicated below. Note that tool movements differ according to the setting of the variables.
Variable setting: PZRC = 0, Bit 3 of VMSBU = 0
Eeoemr5s1034
Machine operation
(1) The Z-axis moves at a rapid feedrate to the travel end in the positive (+) direction
(2) The spindle is oriented.
(3) The Y-axis and the X-axis, in this order, move at a rapid feedrate to align the tool nose with the
center of the touch sensor.
(4) The Z-axis moves at a skip feedrate, specified by PFA, to the position PUDT above the touch
sensor zero point. The Z-axis stops when the tool comes into contact with the sensor.
(5) The Z-axis moves at a skip feedrate, specified by PF2, to the position POVT below the touch
sensor zero point. The Z-axis stops when the tool comes into contact with the sensor.
(6) The Z-axis moves at a rapid feedrate to the travel end in the positive (+) direction.
2)
Rapid feed 3)
Rapid feed 1)
Touch sensor zero point
PF2 5)
PFA 4)
Rapid feed 6)
PUDT POVT
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Page 43
4297-E P-32
SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
Variable setting: PZRC = 0, Bit 3 of VMSBU = 1
Machine operation
(1) The Z-axis moves at a rapid feedrate to the travel end in the positive (+) direction.
(2) The spindle is oriented.
(3) The Y-axis and the X-axis, in this order, move at a rapid feedrate to align the tool nose with the
center of the touch sensor.
(4) The Z-axis moves down at a rapid feedrate until the spindle nose face reaches the point VLTL
above the touch sensor zero point.
(5) The Z-axis moves at a skip feedrate, specified by PFA, to the position PUDT above the touch
sensor zero point. The Z-axis stops when the tool comes into contact with the sensor.
(6) The Z-axis moves at a skip feedrate, specified by PF2, to the position POVT below the touch
sensor zero point. The Z-axis stops when the tool comes into contact with the sensor.
(7) The Z-axis moves at a rapid feedrate to the travel end in the positive (+) direction.
2)
Rapid feed 3)
Rapid feed 1)
PF2 6)
Rapid feed 7)
Rapid feed 4)
VLTL
PFA 5)
PUDT POVT
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4297-E P-33
SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
Variable setting: PZRC = 1, Bit 3 of VMSBU = 0 or 1 If “PUDT > PSFT”, an alarm (Alarm B 2305 UNTENDED: gauging impossible 64) occurs.
Machine operation
(1) If the tool nose is below the point “touch sensor zero point + PSFT”, the Z-axis moves up at a
rapid feedrate to the point “touch sensor zero point + PSFT”
(2) The spindle is oriented.
(3) The Y-axis and the X-axis, in this order, move at a rapid feedrate to align the tool nose with the
center of the touch sensor.
(4) The Z-axis moves down at a rapid feedrate to the point “touch sensor zero point + PSFT”.
(5) The Z-axis moves down at a skip feedrate PFA to the point “touch sensor zero point + PUDT”.
(6) The Z-axis moves down at a skip feedrate PF2 to the point “touch sensor zero point - POVT”.
(7) The Z-axis moves up at rapid feedrate to the point “touch sensor zero point + PSFT”.
2)
Rapid feed 3)
2)
PFA 5)
Rapid feed 1)
PF2 6)
Rapid feed 7)
Rapid feed 4)
PSFT
PUDT POVT
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Page 45
4297-E P-34
SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
3. Automatic Tool Length Offset/Automatic Tool Breakage Detection Function for Special Tools and Attachments
This section deals with the automatic tool length offset/automatic tool breakage detection function for special tools and attachments. If no such tools or attachments are used, this section may be skipped.
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3-1. Automatic Tool Length Offset/Automatic Tool Breakage Detection
Function for Horizontal Tools of MCM
The operation procedure for the automatic tool length offset/automatic tool breakage detection func­tion for horizontal tools of MCM is described below.
Eeoemr5s1036
NOTICE
Since the machine operations for the automatic tool length offset/automatic tool breakage detec­tion function used for horizontal tools of MCM are similar to those for vertical tools of MCM, part of the explanation is omitted. For the information not given below, refer to [2. Automatic Tool Length Offset/Automatic Tool Breakage Detection Operation].
Machine operation
During the execution of the automatic tool length offset/automatic tool breakage detection cycle for the horizontal tool of MCM, the tool moves as indicated below.
(1) The Z-axis moves at a rapid feedrate to the travel end in the positive (+) direction.
(2) M76 and M19 are executed.
The swivel head is indexed to the right position and the spindle is oriented.
(3) The Y-axis moves at a rapid feedrate to a position just before the touch sensor.
(4) The Z-axis moves at a rapid feedrate to the touch sensor position for the horizontal tool.
(5) From here on, the movements are the same as for a vertical tool.
Note, however, that with an MCM horizontal tool, the Z-axis movements of a vertical tool are replaced by the Y-axis movements of a horizontal tool.
3)
2)
1) 4)
5)
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SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
3-1-1. Setting the Z-axis Lower Limit Position
4297-E P-35
When executing the automatic tool length offset/automatic tool breakage detection cycle for an MCM horizontal tool, the spindle may strike the workpiece during Z-axis downward operation. To avoid such a problem, it is necessary to set the Z-axis lower limit position as close to the touch sensor as possible, but at a position where the spindle or other machine unit will not collide with the touch sensor unit. Set the Z-axis lower limit position in the manner indicated below.
Procedure :
1 Move the Y-axis to the position where the Z-axis lower limit position is to be set.
In this operation, the X- and Z-axis may be at any position.
2 At this position, execute the following program after selecting the automatic mode.
CALL OO32 M02 When this program is executed, axes do not move. After the execution of the program, the actual position of the Z-axis is stored in system work coordinate system No. 9 as the Z-axis lower limit position. The set value can be checked by opening the MSB ZERO OFFSET (VSZO✽[N]) pop-up win­dow on the GAUGING RESULTS screen. The Z-axis lower limit coordinate value is displayed at the Y column of the NO. 9 line.
[Supplement]
Since system work coordinate system No. 9 is used exclusively for automatic tool length offset and automatic tool breakage detection functions, it cannot normally be set or referenced.
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SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
3-1-2. Designating the Operation Mode
4297-E P-36
As with a vertical tool, the basic operation mode for a horizontal tool is set using system variable VFST. The setting for system variable VFST is the same as that for a vertical spindle with the exception that “1” is set for bit 6. VFST consists of one byte (8 bits) and each bit has the following significance
VFST
Bit No. Setting Description
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Bit 0
Bit 1 1
Bit 2 1
Bit 3 1
Bit 4 0 Always set “0” Bit 5 0 Always set “0”.
Bit 6
Bit 7
0 Automatic tool breakage detection cycle 1 Automatic tool length offset cycle
Executes the automatic tool length offset/automatic tool breakage detec­tion cycle in the Z-axis (radial) direction
Executes the automatic tool length offset/automatic tool breakage detec­tion cycle in the Z-axis (radial) direction after the execution of the auto­matic tool length offset/automatic tool breakage detection cycle in the Y­axis (tool length) direction. To execute an automatic tool length offset/automatic tool breakage detection cycle only in the Y-axis (tool length) direction, set “0” for both Bit 1 and Bit 2
Does not move the X-axis when positioning a tool to the touch sensor position.
0
1
0
1
Executes the automatic tool length offset/automatic tool breakage detec­tion cycle for a vertical tool.
Executes the automatic tool length offset/automatic tool breakage detec­tion cycle for a horizontal tool.
Designates the relative offset type. The tool length in reference to the reference tool used for zero point set­ting of a work coordinate system is used as the tool length offset data.
Designates the absolute offset type. The length of the tool from the spindle nose surface is regarded as the tool length offset data
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Page 48
4297-E P-37
SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
An example of VFST settings is given in the following table.
Model
MCM
Horizon-
tal tool
Relative/ Absolute
Offset Type
Relative
offset
Absolute
offset
X-axis
Movement
Yes/No
No
No
Offset in Tool Length Direction/Tool Radial
Direction
Offset only in the tool
length direction
Offset only in the tool
radial direction
Offset in the tool
length direction then
the tool radial direction
Offset only in the tool
length direction
Offset only in the tool
radial direction
Offset in the tool
length direction then
the tool radial direction
Automatic Tool Length Off-
set/Automatic Tool Break-
age Detection
Automatic tool length offset #49H
Automatic tool breakage
detection
Automatic tool length offset #4BH
Automatic tool breakage
detection
Automatic tool length offset #4DH
Automatic tool breakage
detection
Automatic tool length offset #C9H
Automatic tool breakage
detection
Automatic tool length offset #CBH
Automatic tool breakage
detection
Automatic tool length offset #CDH
Automatic tool breakage
detection
VFST Value
#48H
#4AH
#4CH
#C8H
#CAH
#CCH
Page 49
SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
3-1-3. Setting the Zero Point of Horizontal Tool Touch Sensor
4297-E P-38
Set the zero point of the touch sensor for MCM horizontal tools in the manner indicated below.
Procedure :
1 Select the MDI mode and execute M144 to move the reference tool near the horizontal tool
touch sensor. Since the procedure up to this step is the same as used for a vertical tool, refer to [2-1. Setting the Touch Sensor Zero Point] for details.
2 Execute the following program after selecting the automatic mode.
• Setting the zero point for the tool length (Y-axis) direction touch sensor
CALL OO30 PAXI=#27H PLI=0 (or accurate reference tool length) (VFST=✽✽) M02
• Setting the zero point for the tool radius (Z-axis) direction touch sensor
CALL OO30 PAXI=#47H PLI=0 (or accurate reference tool length) (VFST=**)
PZ=Accurate radius of the reference tool
M02
The result of gauging is stored in the system work coordinate system No. 7 (zero point of the tool length direction (Y-axis direction) touch sensor) and the system work coordinate system No. 8 (zero point of the tool radius direction (Z-axis direction) touch sensor). The set value can be checked by opening the MSB ZERO OFFSET (VSZO✽[N]) pop-up window on the GAUGING RESULTS screen.
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EIOEMR5S1025R01
[Supplement]
Before setting the zero point, index the swivel head to the following position. Vertical tool: Front position (M73) Horizontal tool: Right position (M76)
Page 50
SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
3-1-4. Automatic Tool Length Offset for Horizontal Tools
4297-E P-39
Automatic tool length offset for horizontal tools is executed in the manner indicated below.
Eeoemr5s1041
NOTICE
Before executing automatic tool length offset for horizontal tools, make sure that the zero point of the horizontal tool touch sensor has been set
Procedure :
1 After selecting the MDI mode, input “VFST=✽✽”, and press the CYCLE START button.
Set an appropriate value for "✽✽" by referring to [3-1-2. Designating the Operation Mode].
2 Mount the tool for which automatic tool length offset should be executed in the spindle.
3 Execute the following program after selecting the automatic mode.
• In the tool length (Y-axis) direction
CALL OO30 (VFST=Appropriate value) (PLI=Anticipated tool length) M02
• In the tool radius (Z-axis) direction
CALL OO30 (VFST=Appropriate value) PZ=Anticipated tool radius M02
• Both in the tool length (Y-axis) direction and the tool radius (Z-axis) direction
CALL OO30 (VFST=Appropriate value) PZ=Anticipated tool radius (PLI=Anticipated tool length) M02
When the program is executed, the tool is automatically brought into contact with the touch sensor and the cutter radius compensation data is calculated and stored in the CNC memory. The result of gauging can be checked by displaying the TOOL LENGTH OFFSET/CUTTER RADIUS COMPENSATION screen of the TOOL DATA screen. The obtained results are also displayed on the GAUGING RESULTS screen.
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SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
3-1-5. Automatic Tool Breakage Detection Cycle for Horizontal Tools
4297-E P-40
Automatic tool breakage detection for horizontal tools is executed in the manner indicated below.
Eeoemr5s1042
NOTICE
Before executing automatic tool breakage detection for horizontal tools, make sure that the zero point of the horizontal tool touch sensor has been set.
Procedure :
1 After selecting the MDI mode, input “VFST=✽✽”, and press the CYCLE START button.
Set an appropriate value for "✽✽" by referring to [3-1-2. Designating the Operation Mode].
2 Mount the tool for which automatic tool breakage detection should be executed in the spindle.
3 Execute the following program after selecting the automatic mode.
• In the tool length (Y-axis) direction
CALL OO30 PLE1=Tool breakage judgment value (VFST=Appropriate value) M02
• In the tool radius (Z-axis) direction
CALL OO30 PLEZ=Tool breakage judgment value PZ=Anticipated tool radius (VFST=Appropriate value) M02
• Both in the tool length (Y-axis) direction and the tool radius (Z-axis) direction
CALL OO30 PZ=Anticipated tool radius
PLE1=Tool breakage judgment value (tool length direction) PLEZ=Tool breakage judgment value (tool radius direction) (VFST=Appropriate value)
M02
EIOEMR5S1026R01
When the program is executed, the tool is automatically brought into contact with the touch sensor, and the tool length is calculated. The function compares the obtained tool length to the tool length offset data stored in the CNC memory and judges the tool has been broken if the difference is greater than the set tool breakage judgment value. The result of gauging is displayed at the GAUGING RESULTS screen.
[Supplement]
Before executing tool length offset/tool breakage detection for horizontal tools, index the swivel head to the following position. Vertical tool: Front position (M73) Horizontal tool: Right position (M76) All other supplements are the same as in the case of vertical tools.
Page 52
4297-E P-41
SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
3-2. Operation for Automatic Tool Length Offset/Automatic Tool Break-
age Detection on B/C-axis Attachments, 90° Angular Attachments and Extension Attachments (Option)
This subsection describes the functions of automatic tool length offset/automatic tool breakage detection for tools mounted in a B/C-axis attachment, 90° angular attachment, or extension attach­ment.
(PAC = 90°)
(PAC = 180°)
(PAC = 0°)
Z+
Y+
X+
Fig.1-2 Relationship between PAC Angles and X, Y, Z Axes of 90° Angular Attachment
(PAC = 270°)
Eeoemr5s1043
EIOEMR5S1027R01
PAC = 90
Y+
Fig.1-3 Relationship between PAC Angles and X, Y, Z Axes of B/C-axis Attachment
°
PAC = 180°
PAC = 0°
PAC = 270°
PAB
Z+
X+
EIOEMR5S1028R01
Page 53
4297-E P-42
SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
[Supplement]
1) To use an attachment, index the PAB to 0° or 90°.
2) Call the ATTACHMENT (PAC, PAB) SWIVEL COMPENSATION screen and set the data dis-
played there on the ATTACHMENT SWIVEL COMPENSATION screen. The correspondence between the items displayed on the ATTACHMENT (PAC, PAB) SWIVEL
COMPENSATION screen and those on the ATTACHMENT SWIVEL COMPENSATION screen is indicated below.
ATTACHMENT (PAC, PAB)
SWIVEL COMPENSATION
ATTACHMENT SWIVEL
COMPENSATION screen
screen
Data for PAC = 0 PAB = 0 H* in the LOWER (G185) screen
Data for PAC = 0 PAB = 90 H* in the FRONT (G181) screen
Data for PAC = 90 PAB = 90 H* in the LEFT (G182) screen
Data for PAC = 180 PAB = 90 H* in the REAR (G183) screen
Data for PAC = 270 PAB = 90 H* in the RIGHT (G184) screen
EIOEMR5S1029R01
H*: Attachment compensation numbers H1 to H8 If two B/C-axis attachments are used, set their data with separate compensation numbers.
Page 54
SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
3-2-1. Designating the Operation Mode
4297-E P-43
Use system variable “VFST” to designate the basic operation modes for automatic tool length offset or automatic tool breakage detection. Since the system variable VFST is backed up in the CNC memory, it only has to be designated once: it does not have to be set each time the MSB of the automatic tool length offset/automatic tool breakage detection cycle is called. VFST consists of one byte (8 bits) and each bit has the following significance
VFST
Bit No. Setting Description
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Bit 0
Bit 1 1
Bit 2 1
Bit 3 1
Bit 4 0 Always set “0” Bit 5 0 Always set “0”.
Bit 6
Bit 7
0 Automatic tool breakage detection cycle 1 Automatic tool length offset cycle
Executes the automatic tool length offset/automatic tool breakage detec­tion cycle in the tool radius direction.
Executes the automatic tool length offset/automatic tool breakage detec­tion cycle in the tool radius direction after the execution of the automatic tool length offset/automatic tool breakage detection cycle in the tool length direction. To execute automatic tool length offset/automatic tool breakage detec­tion cycle only in the tool length direction, set “0” for both Bit 1 and Bit 2.
Does not move the X-axis when positioning a reference tool at the touch sensor position. Set “1” for Bit 3 for machine models such as MCV in which the touch sen­sor is installed independently of the X-axis movement.
Executes the automatic tool length offset/automatic tool breakage detec-
0
1
0 Designates the relative offset type. 1 Designates the absolute offset type.
tion cycle for a vertical tool or a tool in the extension attachment or the B/ C-axis attachment (PAB = 0°).
Executes the automatic tool length offset/automatic tool breakage detec­tion cycle for a tool in the 90° attachment or the B/C-axis attachment (PAB = 90°).
Eeoemr5s1044
EIOEMR5S1030R01
Page 55
SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
3-2-2. Command Format
4297-E P-44
The command format used for calling the automatic tool length offset/automatic tool breakage detection cycle for B/C-axis attachment, 90° attachment and extension attachment is indicated below.
CALL(OO30 PAXI=*........) PAT=*
Conventional transfer variable
PAT: Attachment swivel compensation number (Setting range: 1 to 7)
[Supplement]
1) The installation angle of the 90° angular attachment or the B/C-axis attachment (PAB = 90°)
must be set to 270°.
2) The same sensor zero point is used for a vertical tool/extension attachment/90° attachment
(PAB = 0°) and a 90° attachment/B/C-axis attachment (PAB = 90°). Set the sensor zero point so that gauging cycles can be executed without causing trouble for any attachment.
3-2-3. Designating the Attachment
The type of attachment to be used is designated by the setting for VFST, PAXI and PAT as indicated below.
Eeoemr5s1045
EIOEMR5S1031R01
Eeoemr5s1046
Bit 6 of VFST
Vertical spindle 0 0 0 0/1 None
Extension attachment
B/C-axis attachment
(PAB = 0°)
90° attachment
B/C-axis attachment
(PAB = 90°)
0 0 0 0/1 1 to 7
1 0/1 0/1 0 1 to 7
Bit 6 Bit 5 Bit 4
PAXI
Command
3-2-4. Movements of Tool in 90° Attachment/B/C-axis Attachment (PAB = 90°)
When a tool is mounted in the 90° attachment or the B/C-axis attachment (PAB = 90°), the cycle is executed in the same manner as for a tool mounted in the horizontal spindle of MCM. In this case, however, the Z-axis lower limit position is determined taking into account the attach­ment swivel compensation amount. For details and supplemental information on the tool movements of a tool mounted in the 90° attach­ment or the B/C-axis attachment (PAB = 90°), refer to [3-1. Automatic Tool Length Offset/Automatic Tool Breakage Detection Function for Horizontal Tools of MCM].
Eeoemr5s1047
3-2-5. Setting the Tool Change Position
If breakage of a tool is detected (PGO = 2) after the execution of a tool breakage detection cycle, the axes move to the tool change position. The tool change position must be determined so that positioning at the tool change position will not cause interference between the tool and a workpiece with any type of attachment (vertical tool, 90° attachment, extension attachment, B/C-axis attachment (PAB = 0°, 90°)).
Eeoemr5s1048
PAT
Page 56
SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
3-2-6. Setting the Z-axis Lower Limit Position
4297-E P-45
To set the Z-axis lower limit position, add transfer variable PAT to the usual setting program. CALL OO32 PAT=✽ PAT:Attachment swivel compensation number (Setting range: 1 to 7)
3-2-7. Setting the Attachment Swivel Compensation Data
To use the automatic tool length offset/automatic tool breakage detection function, the attachment swivel compensation data must be correctly set. Set the compensation data for the 90° attachment on the ATTACHMENT SWIVEL COMPENSATION screen (G181 to G184) and the data for the extension attachment on the ATTACHMENT SWIVEL COMPENSATION screen (G185).
3-2-8. Measuring the Attachment Swivel Compensation Data
Measure the attachment swivel compensation data for each type of attachment and each attach­ment position by repeating the procedure indicated below and set the obtained data for the corre­sponding item (G181 to G185) on the ATTACHMENT SWIVEL COMPENSATION screen.
Procedure :
1 Mount the reference tool to the spindle where no attachment is mounted and fix a micro-indica-
tor at the center of the table.
2 Manually move the X-, Y- and Z-axis to the position where the micro-indicator reads “0”.
Eeoemr5s1049
Eeoemr5s1050
Eeoemr5s1051
3 Select a desired zero point and set the zero offset data.
Set “0” for the actual position data and take this position as the reference for the following oper­ation.
4 Change the spindle tool to an attachment (90° attachment or extension attachment) and mount
the reference to the attachment.
5 Carry out positioning so that the micro-indicator reads “0” and set the coordinate values at that
position.
• 90° attachment Index the attachment to four positions, 0° (front), 90° (left), 180° (back) and 270° (rear), and carry out positioning at the individual attachment index positions.
• Extension attachment Since the extension attachment is installed at a fixed angle, carry out positioning at the preset angle.
6 Set the compensation data by displaying the ATTACHMENT SWIVEL COMPENSATION
screen.
• Extension attachment Set the coordinate values obtained in the operation in step 5) above on the ATTACH­MENT SWIVEL COMPENSATION screen (G185).
• 90° attachment Calculate the compensation data for each index angle (PAC = 0, 90, 180, 270) based on the coordinate values obtained in step 5) and set the calculated compensation data for the corresponding setting item on the ATTACHMENT SWIVEL COMPENSATION screen (G181 to G184). To calculate the compensation data at each attachment index angle, refer to [3-2-9. Cal­culating the Compensation Data for a 90° Attachment].
Page 57
4297-E P-46
SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
The correspondence between the PAC angle and setting items is indicated below. PAC = 0: G181 (front) at the ATTACHMENT SWIVEL COMPENSATION screen PAC = 90: G182 (left) at the ATTACHMENT SWIVEL COMPENSATION screen PAC = 180: G183 (rear) at the ATTACHMENT SWIVEL COMPENSATION screen PAC = 270: G184 (right) at the ATTACHMENT SWIVEL COMPENSATION screen
Reference tool
X
Z
X
Y
Z
EIOEMR5S1032R01
Page 58
4297-E P-47
SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
An example of attachment compensation numbers
G181
(Front)
(2 stations)
T301 (90° attachment)
T302 (attachment cover)
(3 stations) T301
(90° attachment) T302
(attachment cover) T303
(extension attachment)
(6 stations)
T301 (extension attachment)
T302 (universal attachment)
T303 (special 90° attachment)
T304 (90° attachment)
T305 (blank) - - - - ­T306
(attachment cover)
H1 H1 H1 H1 -
-----
H1 H1 H1 H1 -
-----
----H3
----H1
-----
-----
H4 H4 H4 H4 -
-----
G182 (Left)
G183
(Rear)
G184
(Right)
G185
(Down)
Page 59
SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
3-2-9. Calculating the Compensation Data for a 90° Attachment
4297-E P-48
When a 90° attachment is used, it is necessary to find the attachment swivel compensation data
Eeoemr5s1052
using the coordinate values obtained in step 5) of [3-2-8. Measuring the Attachment Swivel Com­pensation Data]. The formula below are used to match the center of the vertical reference tool with the horizontal ref­erence tool nose.
Vertical reference tool
Horizontal reference tool
EIOEMR5S1033R01
In the explanation below, D1 represents the diameter of the reference tool mounted in the vertical spindle and D2 the diameter of the reference tool mounted in the horizontal spindle.
• PAC = 0°
D
X’ = X +
Y’ = Y
Z’ = Z +
1
2
D
1
D
2
Vertical reference tool
D
2
2
Z+
X+
Horizontal reference tool
EIOEMR5S1034R01
• PAC = 90°
X’ = X
Y’ = Y +
Z’ = Z +
• PAC = 180°
D
1
2
D
2
2
X’ = X +
Y’ = Y
Z’ = Z +
Vertical reference tool
D
1
2
D
2
2
Z+
Y+
Horizontal reference tool
EIOEMR5S1035R01
Z+
X+
EIOEMR5S1036R01
Page 60
4297-E P-49
SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
• PAC = 270°
X’ = X
Z+
Y+
EIOEMR5S1037R01
Y’ = Y +
Z’ = Z +
D
1
2
D
2
2
Page 61
4297-E P-50
SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
3-3. Operation of Automatic Tool Length Offset/Automatic Tool Break-
age Detection with 30° Angular Attachments (Option)
(1) Automatic Tool Length Offset Function
The automatic tool length offset function allows the measurement of tool length offset data for a tool mounted in the 30° angular attachment. Note that this function cannot be used to measure the cutter radius compensation data while a tool is mounted in the 30° angular attachment.
(2) Automatic Tool Breakage Detection Function
The automatic tool breakage detection function allows detection of tool breakage or excessive wear of a tool mounted in the 30° angular attachment. As with the automatic tool length offset function, this automatic tool breakage function is unable check breakage of a tool in the radius direction.
Eeoemr5s1053
3-3-1. Operation Flow of Automatic Tool Length Offset/Automatic Tool Breakage
Detection Function
Measuring the tool length offset value of the reference tool mounted in the vertical spindle
↓
Measuring the tool length offset value of the reference tool mounted in the 30° angular attachment
↓
Setting the relative offset data between the reference tools (VSTOH[20])
↓
Setting the Z-axis lower limit position data
↓
Setting the zero point of the 30° angular attachment touch sensor
↓
Measuring the tool length offset data for a tool mounted in the 30° angular attachment
. . .
Check the breakage of a tool mounted in the 30° angular attachment
. . .
Eeoemr5s1056
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SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
3-3-2. Relative Offset Data between Reference Tools (VSTOH [20])
4297-E P-51
To use the automatic tool length offset/automatic tool breakage detection function with an angular attachment other than a 90° angular attachment(30°, 45°, 60°), a special referent tool, called refer­ence tool B, is used to measure the attachment compensation data. Differing from the convention­ally used reference tool - called reference tool A - which has a cylindrical shape, reference tool B has a ball-shaped nose. When setting the touch sensor zero point, the sensor zero point in the vertical and horizontal direc­tions is usually determined by the length of reference tool A, which is determined by the specification code (Bit 7 of specification code No. 24). When setting the angular attachment touch sensor zero point, however, reference tool B is used to set the zero point. This means the accurate length of the reference tool must be known beforehand. The value used to calculate the length of reference tool B based on the length of reference tool A is called the “relative offset data between reference tools”. If a value is set for PLI, explained in [3-3-5. Setting the Touch Sensor Zero Point], setting the "relative offset data between reference tools" is not necessary. The relative offset data between reference tools can be obtained easily by following the procedure indicated below.
Procedure :
1 Mount reference tool B in the vertical spindle and read the Z-axis coordinate value by bringing
it into contact with the reference block. Assume the read Z-axis coordinate value to be “B”.
2 Mount reference tool A in the vertical spindle and read the Z-axis coordinate value by bringing
it into contact with the reference block. Assume the read Z-axis coordinate value to be “A”.
Eeoemr5s1057
3 Calculate the relative offset data between reference tools using the following formula.
Relative offset data between reference tools = Length of reference tool B
(coordinate value B)
- Length of reference tool A (coordinate value A)
EIOEMR5S1038R01
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SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
3-3-3. Designating the Operation Mode (VFST)
4297-E P-52
Use system variable “VFST” to designate the basic operation modes for automatic tool length offset or automatic tool breakage detection operation for a 30° angular attachment. VFST consists of one byte (8 bits) and each bit has the following significance.
VFST
Bit No. Setting Description
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Bit 0
Bit 1 0 Always set “0”. Bit 2 0 Always set “0”.
Bit 3
Bit 4 0 Always set “0”. Bit 5 0 Always set “0”. Bit 6 0 Always set “0”.
Bit 7
0 Automatic tool breakage detection cycle 1 Automatic tool length offset cycle
Moves the X-axis when positioning a reference tool at the touch sensor position.
0
1
0 Designates the relative offset type. 1 Designates the absolute offset type.
If this setting is made although the zero point of the touch sensor and the X-axis has not been set, this will cause very dangerous situation since positioning is made to the machine zero point in this case.
Does not move the X-axis when positioning a reference tool at the touch sensor position.
Eeoemr5s1058
EIOEMR5S1039R01
NOTICE
Pay attention to the setting of system variable VFST since it is also used for the automatic tool length offset/automatic tool breakage detection functions for a vertical tool, B/C-axis attachment, extension attachment and 90° angular attachment. Although the operation mode is backed up in the CNC memory, you are recommended to set the mode for each execution of the automatic tool length offset/automatic tool breakage detection functions since the setting is also used for other applications as described above.
Page 64
SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
3-3-4. Setting the Z-axis Lower Limit Position (OO32)
4297-E P-53
When the automatic tool length offset/automatic tool breakage detection cycle is executed, a tool must be brought into contact with the touch sensor at the right angle. Therefore, the tool is posi­tioned in the direction in which the touch sensor is at the right angle before executing these cycles with the 30° angular attachment tool. The point where the tool is positioned is called the “approach start position”. The position where the Y-axis should be retracted to avoid interference with a workpiece before posi­tioning to the approach start position is called the Z-axis lower limit position. For details on the approach start position, refer to [3-3-5. Setting the Touch Sensor Zero Point]. The Z-axis lower limit position is also used as the spindle retraction position for sensor unit advance/ retract operation for models such as MCR-B II in which the sensor unit can interfere with the spindle during sensor unit advance/retract operation. Note that the set Z-axis lower limit position is used for the automatic tool length offset/automatic tool breakage detection function of the MCM horizontal tool and the B/C-axis attachment and 90° angu­lar attachment. Therefore, if these specifications are used in combination, set the Z-axis lower limit position with care.
Procedure :
1 Move the Y-axis to the position where the Z-axis lower limit position is to be set.
In this operation, the Z- and X-axis may be at any position.
2 At this position, execute the following program after selecting the MDI or automatic mode.
CALLOO32 When this program is executed, the axes do not move. After the execution of the program, the actual position of the Z-axis is stored in system work coordinate system No. 9 as the Z-axis lower limit position. The set value can be checked by opening the MSB ZERO OFFSET (VSZO✽[N]) pop-up win­dow on the GAUGING RESULTS screen.
Eeoemr5s1059
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SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
3-3-5. Setting the Touch Sensor Zero Point
4297-E P-54
Before executing the automatic tool length offset/automatic tool breakage detection function using the 30° angular attachment, it is necessary to set the zero point of the touch sensor. Follow the procedure indicated below to set the touch sensor zero point.
Procedure :
1 Set the VFST (operation mode) in the MDI or automatic mode.
For this operation, only bit 7 (incremental/absolute offset type selection) has significance. For other bits “0” may be set.
2 Execute M144 (sensor unit advance) in the MDI or automatic mode.
Pay attention to the execution of M144 since the sensor unit may interfere with the spindle on some models.
3 Mount reference tool B to the 30° angular attachment and orient the attachment.
4 Position the tool approximately 10 mm away from the touch sensor so that it will contact the
touch sensor at the right angle when it is moved in the tool length direction.
5 Select the MDI or automatic mode and execute the following program.
CALL OO34 PAXI=#07H After the execution of the program above, the touch sensor zero point coordinate values (X, Y, Z) are set using the designation for PAXI. For details of PAXI designation, refer to [3-3-11. Variables]. Note the relative offset data between the reference tools (VSTOH[20]) is used since PLI is not designated.
Eeoemr5s1060
NOTICE
If PLI is designated, the value to be transferred differs depending on the tool length offset type (VFST setting). For the absolute offset type, set the length of reference tool B from the gauge line to PLI. In the case of the relative offset type, set the relative length of reference tool B in refer­ence to reference tool A.
For details on the relative offset data between the reference tools, refer to [3-3-2. Relative Offset Data between Reference Tools (VSTOH [20])]. How the reference tool moves during the execution of the program is explained in [3-3-6. Reference Tool Movements during Touch Sensor Zero Point Setting]. The result is fed back as the zero point data to system work coordinate system No. 13. The set zero point data can be checked by opening the MSB ZERO OFFSET (VSZO✽[N]) pop-up window on the GAUGING RESULTS screen.
Page 66
SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
3-3-6. Reference Tool Movements during Touch Sensor Zero Point Setting
4297-E P-55
During the execution of the touch sensor zero point setting for a 30° angular attachment, the refer­ence tool moves as indicated below.
Eeoemr5s1061
Machine operation
(1) The reference tool moves to the approach start point (Y- and Z-axis).
The approach start point is calculated on a line extended from the 30° angular attachment touch sensor in the tool length direction. The following two positions are calculated on the extended line: the position where the Z-axis is at the travel limit in the positive direction and the position where the Y-axis is at the lower end limit position of the Z-axis. Of these two positions, the posi­tion that is closer to the touch sensor is taken as the approach start point. Since the sensor position has not been measured at the start of touch sensor zero point setting, the position 10 mm ahead of the point where the tool was moved in step 4) of the operation described in [3-3-5. Setting the Touch Sensor Zero Point] is regarded as the 30° angular attach­ment touch sensor position.
(2) The spindle is oriented.
(3) The reference tool moves the Z-axis lower limit position (Y-axis).
(4) The sensor unit retracts.
(5) The sensor unit advances.
(6) The reference tool moves to the approach start point (Y-axis).
(7) The reference tool is brought into contact with the sensor (Z- and Y-axis).
(8) The reference tool moves to the approach start point (Z- and Y-axis). (9) The reference tool retracts to the Z-axis lower limit position (Y-axis). (If PRET ≠ 1) (10) The sensor unit retracts. (If PRET ≠ 1)
This completes the setting of the touch sensor zero point.
Page 67
SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
3-3-7. Automatic Tool Length Offset Function
4297-E P-56
To measure the tool length of the tool mounted in the 30° angular attachment, follow the procedure indicated below.
Eeoemr5s1062
NOTICE
Before executing automatic tool length offset, make sure that the zero point of the touch sensor has been set.
Procedure :
1 Set the VFST (operation mode) in the MDI or automatic mode.
For this operation, only the following bits have significance. For other bits “0” may be set.
• Bit 7 (incremental/absolute offset type selection)
Set the same value as set in the touch sensor zero point setting operation.
• Bit 3 (X-axis positioning valid/invalid)
“0” (X-axis positioning valid) may be set only when PAXI was used to set the zero point in the touch sensor zero point setting operation. If “0” is set although the X-axis zero point has not been set, it could be dangerous since the X-axis is positioned to the machine zero point.
• Bit 0 (automatic tool length offset/automatic tool breakage detection selection)
Since the operation to be performed is “automatic tool length offset”, “1” should be set here.
2 Mount the tool for which automatic tool length offset is to be executed in the 30° angular attach-
ment and set the angular attachment direction. If the tool is mounted manually, the PH parameter must be specified since the tool number is unknown. The obtained offset data is set as the tool length offset data of the tool number transferred by the PH parameter. The PH parameter does not have to be designated if the tool is mounted using an M code com­mand.
3 Execute the following program after selecting the MDI or automatic mode.
CALL OO34 (PLI=Anticipated tool length) (PH=Tool number) When the program is executed, the tool length is measured. The measured tool length data is set as the tool length offset data of the tool number trans­ferred by PH. If no PH parameter is specified, the data is set as the tool length offset data of the active tool number.
NOTICE
If an anticipated tool length is not set, the minimum tool length is used as the anticipated tool length. Therefore, the minimum tool length must be set beforehand for optional parameter (long word) No. 43, as an absolute value in mm units. If the setting for this parameter is inappropriate, the 30° angular attachment may interfere with the sensor unit. Set a value 10 mm longer than the minimum measurable length (determined by the machine specification) as the minimum tool length. If the minimum measurable length is set as the minimum tool length, the 30° angular attachment will strike the sensor unit if the tool fails to contact the sensor.
Page 68
4297-E P-57
SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
Machine operation
During the execution of automatic tool length offset for the tool mounted in the 30° angular attach­ment, the tool moves as indicated below.
(1) The Z-axis moves up 1 mm from the actual position or to the travel end in the positive (+) direc-
tion. If positioning of the X-axis is valid, X-axis positioning is executed.
(2) The spindle is oriented.
(3) The tool retracts to the Z-axis lower limit position (Y-axis).
(4) The sensor unit advances.
(5) The tool moves to the approach start point (Z-, Y-axis).
If the maximum tool length designation is valid, it moves to the set maximum tool length position (Z-, Y-axis).
(6) The tool is brought into contact with the touch sensor (Z-, Y-axis).
(7) The tool moves to the approach start point (Z-, Y-axis). (8) The tool retracts to the Z-axis lower limit position (Y-axis). (If PRET ≠ 1) (9) The sensor unit retracts. (If PRET ≠ 1)
3-3-8. Tool Change Position Setting Function
When the automatic tool breakage detection cycle detects a tool has been broken, the broken tool can be automatically returned to the magazine by using a subprogram. When a tool is returned to the magazine, it may interfere with a workpiece, depending on the shape of the workpiece. To avoid this, it is necessary to retract the workpiece. The tool change position setting function is used to set the tool change position for this purpose. The spindle is moved to the tool change position by X- and Y-axis movements. Note that whether or not the X-axis moves is determined by the setting for bit 3 of VFST. The X-axis moves only when “0” is set for this bit.
Procedure :
1 Move the spindle to the desired tool change position on the Y-axis.
If the setting that enables X-axis movements is made, move the X-axis also.
2 Execute the following program after selecting the MDI or automatic mode.
CALL OO31 The axes will not move at all even when a program is executed. After the execution of the program, the actual position is set for system work coordinate system No. 2 as the tool change position. The set tool change position data can be checked by opening the MSB ZERO OFFSET (VSZO✽[N]) pop-up window on the GAUGING RESULTS screen.
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SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
3-3-9. Automatic Tool Breakage Detection
4297-E P-58
Automatic tool breakage detection is executed in the manner indicated below for the tool mounted in the 30° angular attachment.
Eeoemr5s1065
NOTICE
Before executing automatic tool breakage detection, make sure that the zero point of the touch sensor has been set.
Procedure :
1 Set the VFST (operation mode) in the MDI or automatic mode.
For this operation, only the following bits have significance. For other bits “0” may be set.
• Bit 7 (incremental/absolute offset type selection)
Set the same value as set in the touch sensor zero point setting operation.
• Bit 3 (X-axis positioning valid/invalid)
“0” (X-axis positioning valid) may be set only when PAXI was used to set the zero point in the touch sensor zero point setting operation. If “0” is set although the X-axis zero point has not been set, it could be dangerous since the X-axis is positioned to the machine zero point.
• Bit 0 (automatic tool length offset/automatic tool breakage detection selection)
Since the operation to be performed is “automatic tool length offset”, “1” should be set here.
2 Mount the tool for which automatic tool length offset is to be executed in the 30° angular attach-
ment and set the angular attachment direction. If the tool is mounted manually, the PH parameter must be specified since the tool number is unknown. The function compares the measured data to the tool length offset data of the tool offset num­ber transferred by PH to judge breakage of the tool. The PH parameter does not have to be designated if the tool is mounted using an M code com­mand.
3 Execute the following program after selecting the MDI or automatic mode.
CALL OO34 (PLE1=Tool breakage judgement value)
(PLE2=Offset value update permissible amount) (PGO=Processing at the occurrence of tool breakage)
EIOEMR5S1040R01
• Tool breakage judgment value (PLE1)
If no value is set for PLE1, the judgment value is taken to be 0.1 mm. The tool is judged to be broken if the absolute value of the difference between the preset tool length and the measured tool length is larger than the judgment value set for PLE1.
• Offset value update permissible amount (PLE2)
When a value is set for PLE2, the present tool length offset data is updated to the mea­sured tool length assuming that the absolute value of the difference between the preset tool length and the measured tool length is smaller than the judgment value set for PLE1 and larger than the offset value update permissible amount.
• Processing on occurrence of tool breakage (PGO)
If a tool is detected to have been broken while no value is set for PGO, an alarm occurs and the tool breakage detection cycle ends without returning the broken tool to the mag­azine.
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SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
If a value is set for PGO to select the processing on occurrence of tool breakage, the specified processing is executed without generating an alarm when tool breakage is detected. PGO = 1: The tool is returned to the magazine without movement to the tool change position. PGO = 2: The tool is returned after positioning to the tool change position. PGO = 3: The tool is not returned to the magazine. Since no alarm occurs if a value is set for PGO, it is necessary to judge tool breakage in a program. For details on judgment of tool breakage in a program, refer to [3-3-10. Judgment for Tool Breakage].
Machine Operation
During the execution of the automatic tool breakage detection for the tool mounted in the 30° angu­lar attachment, the tool moves as indicated below.
(1) The Z-axis moves up 1 mm from the actual position or to the travel end in the positive (+) direc-
tion. If positioning of the X-axis is valid, X-axis positioning is executed.
(2) The spindle is oriented.
(3) The tool retracts to the Z-axis lower limit position (Y-axis).
(4) The sensor unit advances.
(5) The tool moves to the approach start point (Z-, Y-axis).
If the maximum tool length designation is valid, it moves to the set maximum tool length position (Z-, Y-axis).
(6) The tool is brought into contact with the touch sensor (Z-, Y-axis).
(7) The tool is assessed for breakage.
(8) The tool moves to the approach start point (Z-, Y-axis).
(9) The tool retracts to the Z-axis lower limit position (Y-axis). (If PRET ≠ 1)
(10) The sensor unit retracts. (If PRET ≠ 1)
The processing after the detection of tool breakage depends on the setting for PGO.
• PGO = 1:
The tool is returned to the magazine without movement to the tool change position.
• PGO = 2:
The tool is returned after positioning of the X- and Y-axis to the tool change position.
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SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
3-3-10. Judgment for Tool Breakage
4297-E P-60
When a spare tool is selected on detection of tool breakage, the machine is not stopped by an alarm even if the breakage of a tool is detected. Therefore, it is necessary to judge whether or not a tool is broken at the end of the automatic tool breakage detection cycle and branch a part program accord­ing to the result of the judgment.
• System variable VOK1
VOK1 = 1: The tool is not broken. VOK1 ≠ 0: The tool is broken. System variable VOK1 stores the result of the tool breakage detection cycle executed immedi­ately before its designation.
• System variable VOK2
System variable VOK2 is also used for storing the result of the tool breakage detection cycle. Differing from system variable VOK1, it indicates the occurrence of tool breakage in all detec­tion cycles executed after it has been reset to 0 (VOK2 = 0). If tool breakage is detected even once in these cycles, the value of VOK2 is not 0 (VOK2 ≠ 0).
• VOK1 and VOK2 are not reset by resetting the CNC.
[Supplement]
The tool number of the tool which has been judged to be broken in a tool breakage detection cycle is registered as a broken tool by the tool management function. To use the same tool number after replacing the broken tool with a new one, it is necessary to reset the registered broken tool status. For the procedure for resetting this status, refer to Tool Management Function in the special speci­fications of the Operation Manual.
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3-3-11. Variables
4297-E P-61
Variables used in the subroutines that execute automatic tool length offset/automatic tool breakage detection for the 30° angular attachment.
PH: Tool offset number
Used to designate a tool offset number if a tool offset number different from the tool num­ber of the active tool is used for automatic tool length offset/automatic tool breakage detection.
PAXI: One byte (8 bits) transfer variable used when the sensor zero point is set. Each bit has
the following meaning.
PAXI
Bit No. Description
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Bit 0 Sets the X-axis zero point. Bit 1 Sets the Y-axis zero point. Bit 2 Sets the Z-axis zero point. Bit 3 Always set “0”. Bit 4 Always set “0”. Bit 5 Always set “0”. Bit 6 Always set “0”. Bit 7 Always set “0”.
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EIOEMR5S1041R01
VFST: Designates the operation mode. For details refer to [3-3-3. Designating the Operation
Mode (VFST)].
PLE1: Designates the tool breakage judgment value. For details refer to [3-3-9. Automatic Tool
Breakage Detection].
PLE2: Designates the offset value update permissible amount. For details, refer to [3-3-9. Auto-
matic Tool Breakage Detection].
PLI: Designates the length of the reference tool when setting the touch sensor zero point.
Designates the anticipated tool length when measuring the tool length. PRS: This is an RS command for multi-point spindle orientation operation. PRET: Touch sensor retraction preventive command
This is a function to prevent touch sensor retraction at the end of the touch sensor zero
point setting, automatic tool length offset and automatic tool breakage detection. PGO: Designates the processing to be followed on detection of tool breakage. For details, refer
to [3-3-9. Automatic Tool Breakage Detection]. PX: Designates the displacement in the X-axis direction during positioning to the sensor posi-
tion.
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SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION

4. Y-axis Escape Position (MCM-B/MCR-B II/MCR-A/VH-40)

During execution of automatic tool length offset (cutter radius compensation) or tool breakage detec­tion on the vertical or horizontal spindle of MCM-B/MCR-B II/MCR-A, the tool may interfere with the touch sensor unit cover. With VH-40, execution of automatic tool length offset or tool breakage detection may also cause interference between the table and the touch sensor unit. In order to prevent such interference, the Y-axis escape cycle should be executed after setting the Y­axis escape position.

4-1. Setting the Y-axis Escape Position

Setting the Y-axis Escape Position for the Vertical Spindle
Set the Y-axis escape position for the vertical spindle (includes VH-40) by following the procedure indicated below.
Procedure :
1 Move the Y-axis to the desired Y-axis escape position.
In this operation, the X- and Z-axis may be at any position.
2 At this position, execute the following program after selecting the automatic mode.
CALL OO33 M02 When this program is executed, the axes do not move. After the execution of the program, the actual position of the Y-axis is stored in system work coordinate system No. 12 as the Y-axis escape position. The set value can be checked by opening the MSB ZERO OFFSET (VSZO✽[N]) pop-up win­dow on the GAUGING RESULTS screen.
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Setting the Y-axis Escape Position for the Horizontal Spindle
Set the Y-axis escape position for the vertical spindle by following the procedure indicated below.
Procedure :
1 Move the Y-axis to the desired Y-axis escape position.
In this operation, the X- and Z-axis may be at any position.
2 At this position, execute the following program after selecting the automatic mode.
ALL OO32 M02 When this program is executed, the axes do not move. After the execution of the program, the actual position of the Y-axis is stored in system work coordinate system No. 9 as the Y-axis escape position. The set value can be checked by opening the MSB ZERO OFFSET (VSZO✽[N]) pop-up win­dow on the GAUGING RESULTS screen.
[Supplement]
Since system work coordinate systems No. 9 and No. 12 are used exclusively for automatic tool length offset (cutter radius compensation) and automatic tool breakage detection functions, they cannot normally be set or referenced.
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SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
CAUTION
Set the Y-axis escape position at a position where interference between the tool and the touch sensor unit cover will not occur.
4-2. Tool Movements during Automatic Tool Length Offset (Cutter
Radius Compensation)/Automatic Tool Breakage Detection Cycle
During automatic tool length offset (cutter radius compensation)/automatic tool breakage detection, the tool moves as indicated below.
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Machine operation in the case of vertical machining center (including VH-40)
(1) The Z-axis moves at a rapid feedrate to the travel end in the positive (+) direction.
(2) The Y-axis moves at a rapid feedrate to the Y-axis escape position (the position set at system
work coordinate system No. 9).
(3) The spindle is oriented.
(4) If the movable type sensor is used, the sensor moves back* once and then moves forward.
* The sensor unit does not move back if it is already at the retract end position.
(5) The X- and Y-axis move at a rapid feedrate to align the tool nose with the center of the touch
sensor.
(6) The tool is brought into contact with the touch sensor according to the selected cycle (automatic
tool length offset (cutter radius compensation)/automatic tool breakage detection cycle).
(7) The Z-axis moves at a rapid feedrate to the travel end in the positive (+) direction.
(8) The Y-axis moves at a rapid feedrate to the Y-axis escape position (the position set at system
work coordinate system No. 12).
(9) If the movable type sensor is used, the sensor moves back.
[Supplement]
With the VH-40, since the touch sensor zero point in the Y-axis direction is set at the same position as the Y-axis escape position, only the X-axis moves in step 5).
Machine operation in the case of horizontal machining center
(1) The Z-axis moves at a rapid feedrate to the travel end in the positive (+) direction.
(2) The Y-axis moves at a rapid feedrate to the Y-axis escape position (the position set at system
work coordinate system No. 9).
(3) The spindle is oriented.
(4) If the movable type sensor is used, the sensor moves back* once and then moves forward.
* The sensor unit does not move back if it is already at the retract end position.
(5) The X- and Y-axis move at a rapid feedrate to align the tool nose with the center of the touch
sensor.
(6) The tool is brought into contact with the touch sensor according to the selected cycle (automatic
tool length offset (cutter radius compensation)/automatic tool breakage detection cycle).
(7) The Z-axis moves at a rapid feedrate to the travel end in the positive (+) direction.
(8) The Y-axis moves at a rapid feedrate to the Y-axis escape position (the position set at system
work coordinate system No. 9).
(9) If the movable type sensor is used, the sensor moves back.
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SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
5. Interference Prevention Measures for MCV-A/MCV-A II During Execution of the Automatic Tool Length Offset/ Automatic Tool Breakage Detection Cycle
This function prevents interference between the touch sensor and the coolant trough, and between the spindle tool and the chip cover, during the execution of the automatic tool length offset (cutter radius compensation)/automatic tool breakage detection cycle for the MCV-A/MCV-A II. To make this function valid, set “1” for CNC optional parameter (bit) No. 36, bit 4.
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5-1. Touch Sensor Operation Interlock

A notch is provided in the coolant trough and the touch sensor zero point is set above the notch to prevent interference of the coolant trough with the touch sensor. Touch sensor advance is enabled only at the touch sensor zero point. If the M144 command (touch sensor advance) is executed although the X-axis is not at the touch sensor zero point, the touch sensor does not move and the following alarm occurs. The touch sensor can be advanced only through the notched part. 2437 Alarm B Improper M code 5 The X-axis touch sensor zero point described here is the position set by touch sensor zero point set­ting in the Z-axis direction and means the X-axis coordinate value in the system work coordinate system No. 1.
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5-2. Measures against Interference during Execution of the Automatic
Tool Length Offset/Tool Breakage Detection Cycle
In order to avoid interference between the tool and the chip cover, the X-axis touch sensor zero point must be set at the center of the notch provided in the chip cover so that the tool crosses the chip cover through that point.
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5-2-1. Provisional Setting of the X-axis Touch Sensor Zero Point
Since the M144 command (touch sensor advance) is invalid unless the X-axis is located at the touch sensor zero point, the provisional X-axis zero point must be set before setting the X-axis touch sen­sor zero point. Note that this setting is not necessary when adjusting a touch sensor zero point that has already been set.
Procedure :
1 Move the X-axis by manual operation to align the touch sensor with the center of the notch in
the coolant trough.
2 Select the MDI mode and execute “VFST=✽✽”.
For "✽✽" set an appropriate value by referring to [6-3. How to Use Variables]. Here, the opera­tion mode may be either automatic tool length offset or automatic tool breakage detection.
3 Select the MDI mode and execute “VSZOX[1]=VRCOX-VMOFX”.
4 Execute M144.
[Supplement]
Set the touch sensor zero point in the Z direction by designating “PAXI=7”.
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5-2-2. Automatic Tool Length Offset/Automatic Tool Breakage Detection
4297-E P-65
Before executing the automatic tool length offset or tool breakage detection cycle, set “0” for bit 3 of VFST to enable X-axis movement. VFST setting for the execution of the automatic tool length offset or automatic tool breakage detec­tion cycle
• Relative offset
Automatic tool length offset: 1 Automatic tool breakage detection: 0
• Absolute offset
Automatic tool length offset: #81H Automatic tool breakage detection: #80H
This instruction manual specifies that the tool moves to the touch sensor position during the execu­tion of an automatic tool length offset or tool breakage detection cycle in the following sequence: Z-axis upper limit → Y-axis touch sensor position → X-axis touch sensor position. In this order of tool movements, however, the tool will interfere with the chip cover. The setting indicated above changes the order to: Z-axis upper limit → Z-axis touch sensor position → Y-axis touch sensor position. Similarly, if “PGO = 2” is designated, the order of tool movements to the tool change position (the position set by the execution of OO31), where the tool moves after the detection of tool breakage, is changed to: Z-axis upper limit → Y-axis tool change position → X-axis tool change position.
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SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION

6. Variables Used in Subprograms

4297-E P-66
The basic command format of the automatic tool length offset function and the automatic tool break­age detection function was explained in the previous subsections. In this subsection, the variables necessary to make effective use of these functions are described.

6-1. Table of Subprograms and Variables

Setting of Z-axis touch sensor zero point
Setting of Y-axis touch sensor zero point
Setting of tool change position (Not necessary for MC-H)
Subpro-
gram
Name
OO30 PAXI:
OO30 PAXI:
OO31 None None None
Variables for which a Numeri-
cal Value Must be Set
=3
=4
=7
VFST:
=#17H
VFST: PLI:
PY:
Setting of X- and Y­axis zero points Setting of Z-axis zero point Setting of X-, Y- and Z-axis zero points Operation mode
Setting of X-, Y- and Z-axis zero points Operation mode Accurate tool length of reference tool used in setting the zero point Accurate cutter radius of reference tool used in setting the zero point
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Variables for which a Numeri-
cal Value Should be Set as
Needed
PLI:
PRS:
PRET: =1 PH:
PD:
PRS:
PRET: =1
PH:
PD:
Accurate tool length of reference tool used in setting the zero point Spindle orientation angle Sensor does not retract. Tool length offset number Cutter radius com­pensation number
Spindle orientation angle
Sensor does not retract. Tool length offset number Cutter radius com­pensation number
Variable
which Must
not be
Used
None
None
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SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
Automatic tool length offset
Subpro-
gram
Name
OO30 VFST:
Variables for which a Numeri-
PY:
cal Value Must be Set
Operation mode Approximate dis­placement of tool nose in the Y-axis direction from the center of the spindle (i.e., cutter radius) Always set when executing Y-axis automatic tool offset
Variables for which a Numeri-
cal Value Should be Set as
Needed
PLI:
PX:
PY:
PFA:
PF1:
PF2:
PRS:
PRET: =1
PH:
PD:
Anticipated tool length Approximate dis­placement of tool nose in the X-axis direction from the center of the spin­dle+/- values are possible. Approximate dis­placement of tool nose in the Y-axis direction from the center of the spindle Feedrate for the movement from the sensor to undertravel point, PUDT (safety distance) Skip feedrate for the first contact detec­tion cycle Skip feedrate for the second contact detection cycle Spindle orientation angle
Sensor does not retract. Tool length offset number Cutter radius com­pensation number
Variable
which Must
not be
Used PAXI
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SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
Automatic tool breakage detection
Subpro-
gram
Name
OO30 VFST:
Variables for which a Numeri-
PY:
cal Value Must be Set
Operation mode Approximate dis­placement of the tool nose in the Y-axis direction from the center of the spindle (i.e., cutter radius) Always set when executing Y-axis automatic tool break­age detection
Variables for which a Numeri-
cal Value Should be Set as
Needed
PX:
PY:
PLE1:
PLEY:
PLE2:
PGO:
PRS:
PRET: =1
PH:
PD:
PFA:
PF1:
PF2:
Approximate dis­placement of the tool nose in the X-axis direction from the center of the spindle +/- values are possi­ble. Approximate dis­placement of the tool nose in the Y-axis direction from the center of the spindle +/- values are possi­ble. Z-axis direction tool breakage judgment value Y-axis direction tool breakage judgment value Offset value update permissible amount Processing on occurrence of tool breakage Spindle orientation angle
Sensor does not retract. Tool length offset number Cutter radius com­pensation number Feedrate for the movement from the sensor to the under­travel point, PUDT (safety distance) Skip feedrate for the first contact detec­tion cycle Skip feedrate for the second contact detection cycle
Variable
which Must
not be
Used PAXI
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SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION

6-2. Table of Subprograms and Variables (MCM Horizontal Tools)

Setting of tool length direction touch sensor zero point (Y-axis)
Setting of tool radius direction touch sensor zero point (Z-axis)
Z-axis lower limit setting
Eeoemr5s1083
Subpro-
gram
Name
OO30 PAXI:
OO30 PAXI
OO32 None None None
Variables for which a Numeri-
cal Value Must be Set
=#23H
=#24H
=#27H
VFST:
=#47H
VFST: PLI:
PZ:
Setting of X- and Y­axis zero points Setting of Z-axis zero point Setting of X-, Y- and Z-axis zero points Operation mode
Setting of X-, Y- and Z-axis zero points Operation mode Accurate tool length of reference tool used in setting the zero point Accurate cutter radius of reference tool used in setting the zero point
Variables for which a Numeri-
cal Value Should be Set as
Needed
PLI:
PRS:
PRET: =1
PH:
PD:
PRS:
PRET: =1
PH:
PD:
Accurate tool length of reference tool used in setting the zero point Spindle orientation angle
Sensor does not retract. Tool length offset number Cutter radius com­pensation number
Spindle orientation angle
Sensor does not retract. Tool length offset number Cutter radius com­pensation number
Variable
which Must
not be
Used
None
None
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SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
Automatic tool length offset
Subpro-
gram
Name
OO30 VFST:
Variables for which a Numeri-
PZ:
cal Value Must be Set
Operation mode Approximate dis­placement of tool nose in the tool radius direction (Z­axis direction) Always set when executing automatic tool length offset in the tool radius direc­tion
Variables for which a Numeri-
cal Value Should be Set as
Needed
PLI:
PX:
PZ:
PFA:
PF1:
PF2:
PRS:
PRET: =1
PH:
PD:
Anticipated tool length Approximate dis­placement of tool nose in the X-axis direction from the center of the spindle Approximate dis­placement of tool nose in the Z-axis direction from the center of the spindle Feedrate for the movement from the sensor to the under­travel point, PUDT (safety distance) Skip feedrate for the first contact detec­tion cycle Skip feedrate for the second contact detection cycle Spindle orientation angle
Sensor does not retract. Tool length offset number Cutter radius com­pensation number
Variable
which Must
not be
Used PAXI
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SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
Automatic tool breakage detection
Subpro-
gram
Name
OO30 VFST:
Variables for which a Numeri-
PZ:
cal Value Must be Set
Operation mode Approximate dis­placement of tool nose in the tool radius direction (Z­axis direction) Always set when executing automatic tool length offset in the tool radius direc­tion
Variables for which a Numeri-
cal Value Should be Set as
Needed
PX:
PZ:
PLE1:
PLEZ:
PLE2:
PGO:
PRS:
PRET: =1
PH:
PD:
PFA:
PF1:
PF2:
Approximate dis­placement of tool nose in the X-axis direction from the center of the spindle Approximate dis­placement of tool nose in the Z-axis direction from the center of the spindle Tool length direction (Y-axis direction) tool breakage judgment value Tool radius direction (Z-axis direction) tool breakage judgment value Offset value update permissible amount Processing on occurrence of tool breakage Spindle orientation angle
Sensor does not retract. Tool length offset number Cutter radius com­pensation number Feedrate for the movement from the sensor to the under­travel point, PUDT (safety distance) Skip feedrate for the first contact detec­tion cycle Skip feedrate for the second contact detection cycle
Variable
which Must
not be
Used PAXI
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SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION

6-3. How to Use Variables

4297-E P-72
The following describes how the variables given in the tables in [6-1. Table of Subprograms and Vari­ables] and [6-2. Table of Subprograms and Variables (MCM Horizontal Tools)] are used. Note the numerical values must be in the units presently in use.
(1) VFST (V
• VFST sets the basic operation mode for automatic tool length offset and automatic tool
• Since the system variable VFST is backed up in the CNC memory, it only has to be desig-
• The automatic tool length offset and automatic tool breakage detection cycles can be exe-
• VFST consists of one byte (8 bits) and each bit has the following significance.
VFST
FIRST)
breakage detection cycles.
nated once: it does not have to be set each time OO30 is called.
cuted even in the same part program. In this case, set “1” for bit 0 of VFST when executing an automatic tool length offset cycle. To execute an automatic tool breakage detection cycle, set “0” for bit 0 of VFST.
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Bit No. Setting Description
Bit 0
Bit 1 1
Bit 2 1
Bit 3 1
Bit 4 0 Always set “0”. Bit 5 0 Always set “0”.
Bit 6
Bit 7
0 Automatic tool breakage detection cycle 1 Automatic tool length offset cycle
Executes an automatic tool length offset/automatic tool breakage detection cycle in the tool radius direction.
Executes an automatic tool length offset/automatic tool breakage detection cycle in the Y-axis direction after the execution of an automatic tool length offset/automatic tool breakage detection cycle in the Z-axis direction. To execute an automatic tool length offset/automatic tool breakage detection cycle only in the Z-axis direction, set “0” for both Bit 1 and Bit 2.
Does not move the X-axis when positioning a reference tool at the touch sensor position. Set “1” for Bit 3 with machine models such as MCV, MCM and MCR in which the touch sensor is installed indepen­dently of the X-axis movement.
0
1
0 Designates the relative offset type. 1 Designates the absolute offset type.
Does not execute an automatic tool length offset/automatic tool breakage detection cycle for MCM horizontal tools.
Executes an automatic tool length offset/automatic tool breakage detection cycle for MCM horizontal tools.
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SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
(2) PLE1 (P
LENGTH ERR 1)
• This indicates the tool breakage judgement value and must be set as an absolute value.
• A tool is judged to have been broken if:
PLE1 < | (Preset tool length offset data) - (Measured tool length) |
• If PLE1 is not set when executing a tool breakage detection cycle, 0.1 mm is automatically
set for PLE1 in the subprogram.
(3) PLE2 (P
LENGTH ERR 2)
• This indicates the permissible offset update value and must be set as an absolute value.
• If tool breakage is not detected in a tool breakage detection cycle and the following condition
is satisfied, the tool length offset data is updated according to the measured tool length. PLE2 < | (Preset tool length offset data) - (Measured tool length) | < PLE1
• As the tool length offset data is updated each time the cycle is executed, it must be carefully
attended to in reference to the occurrence of tool breakage. When PLE2 is not set, the tool length offset data is not updated.
(4) PLEY (P
LENGTH ERROR Y-AXIS)
• This indicates the tool breakage judgement value in the Y-axis direction and must be set as
an absolute value.
• A tool is judged to have been broken if:
PLE1 < | (Preset cutter radius compensation data) - (Measured cutter radius) |
• If PLE2 is not set when executing a tool breakage detection cycle, 0.1 mm is automatically
set for PLE1 in the subprogram.
(5) PAXI
• This designates the axis for which the touch sensor zero point is set.
• PAXI consists of one byte (8 bits) and each bit has the following significance.
PAXI
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
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SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
Bit No. Description
Bit 0 Sets the X-axis zero point. Bit 1 Sets the Y-axis zero point. Bit 2 Sets the Z-axis zero point. Bit 3 Always set “0”.
0: Sets the zero point of the tool length direction touch sensor for a vertical
Bit 4
Bit 5
Bit 6
Bit 7 Always set “0”.
Setting value of PAXI
Axis Name
Setting of X- and Y-axis zero
points
Setting of Z-axis zero point 4 (#14H) #24H (#44H)
Setting of X-, Y- and Z-axis
zero points
tool. 1: Sets the zero point of the tool radius direction touch sensor for a vertical tool.
Sets the zero point of the tool length direction touch sensor for a horizontal tool.
Sets the zero point of the tool radius direction touch sensor for a horizontal tool.
Sensor Direction
Vertical Tool MCM Horizontal Tool
Length Direc-
tion Sensor
3 (#13H) #23H (#43H)
7 #17H #27H #47H
Radius Direc-
tion Sensor
Length Direc-
tion Sensor
Radius Direc-
tion Sensor
(6) PX
• This indicates an approximate displacement of the tool nose from the center of the tool
(spindle) in the X-axis direction. Designation of plus and minus values is possible. When PX is not set, “PX = 0” is automatically set in a subprogram.
• When the X- and Y-axis move to the center of the touch sensor during automatic tool length
offset/automatic tool breakage detection cycle, the tool is positioned PX away from the cen­ter of the touch sensor so that the tool nose is aligned with the center of the touch sensor.
• Since the touch sensor is installed close to the travel limit, pay attention to the setting of PX
in reference to the travel limit.
(7) PY
This indicates an approximate displacement of the tool nose from the center of the tool (spindle) in the Y-axis direction. For other details, refer to the explanation for “PX”. When setting the Y-axis zero point, an accurate cutter radius (displacement of the tool nose in the Y-axis direction) of the reference tool used for zero point setting must be set for PY.
Page 86
4297-E P-75
SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
(8) PZ
This indicates an approximate displacement of the tool nose from the center of the tool (spindle) in the Z-axis direction. For other details, refer to the explanation for “PX”.
(9) PLI
• When setting the touch sensor zero point
Set the reference tool length for PLI.
• Relative offset type
Set the length of the reference tool used for touch sensor zero point setting in relation to the length of the tool used for setting the zero point of the work coordinate system. When no setting is made, it is automatically assumed that “PLI = 0”.
• Absolute offset type
Set the length of the reference tool used for touch sensor zero point setting from the tool nose surface. When no setting is made, it is automatically assumed that “PLI = 150 mm” or “PLI = 200 mm”. Which of the values is used is determined by the machine model.
• When executing the automatic tool length offset cycle
Set the anticipated tool length for PLI.
• Relative offset type
Set the relative length of the tool in reference to the reference tool (200 mm or 150 mm). This corresponds to dimension “a” (Tool length - Reference tool length) in the illustration below.
• Absolute offset type
Set the length of the tool between the spindle nose (gauge line) and the tool nose. This corresponds to dimension “b” in the illustration below.
Reference tool
a
b
Spindle nose surface
EIOEMR5S1044R01
When the tool set in the spindle moves toward the touch sensor, it advances to an imagi­nary position 10 mm beyond the position where it would come into contact with the touch sensor. If PLI is not set, the minimum tool length set for CNC optional parameter (long word) No. 43 is taken as the tool length.
Page 87
4297-E P-76
SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
(10) PFA/PF1/PF2
These designate the approach or skip feedrate for tool movements toward the sensor.
• PFA: Feedrate for the movement from the sensor to the undertravel point, PUDT (safety dis-
tance)
• PF1: Skip feedrate for the first contact detection cycle
• PF2: Skip feedrate for the second contact detection cycle
PFA without PLI (anticipated tool length)
PFA with PLI (anticipated tool length)
Skip feedrate for the first contact detection cycle
Skip feedrate for the second contact detection cycle
Override valid
• When PFA command is not designated:
F=PF1 (automatic tool length offset) F4000 (automatic tool breakage detection)
• When PFA command is designated:
F=PF1 (automatic tool length offset) F=PFA (automatic tool breakage detection)
Override valid
• When PFA command is not designated:
F=PF1 (automatic tool length offset) F4000 (automatic tool breakage detection)
• When PFA command is designated:
F=PFA
Override valid
• When PF1 command is not designated:
F2000
• When PF1 command is designated:
F=PF1
Override invalid
• When PF2 command is not designated:
F1000
• When PF1 command is designated:
F=PF2
(11) PGO(P
This determines the processing to be followed after the detection of tool breakage. Selection is possible from “alarm-stop” and “spare tool selection”.
GO)
• When PGO is not set:
When a tool breakage is detected during the automatic tool breakage detection cycle, the CNC stops in the alarm state after the completion of the automatic tool breakage detection cycle.
• When the setting is “PGO = 1”:
When a tool breakage is detected during the automatic tool breakage detection cycle, the broken tool is returned to the magazine after the automatic tool breakage detection cycle is completed. Then, the execution part program is continued. With MC-V and double-column machining centers, the tool change cycle is executed at the X, Y coordinate positions where the cycle has been executed; therefore, do not set “PGO = 1” for these models.
Page 88
4297-E P-77
SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
• When the setting is “PGO = 2”:
This setting is not allowed for MC-H. With MC-H, do not set PGO as “2”. If tool breakage is detected during the automatic tool breakage detection cycle, the X- and Y­axis move to the preset tool change position (Y-axis moves first and then the X-axis) after the completion of the tool breakage detection cycle. Then, the broken tool is returned to the magazine and the execution of the part program is continued. The tool change position must be set beforehand by executing the tool change position set­ting cycle.
• When the setting is “PGO = 3”:
Even when tool breakage is detected during the automatic tool breakage detection cycle, the part program is executed continuously after the automatic tool breakage detection cycle.
If the setting for PGO is “1”, “2” or “3”, regardless of whether or not the broken tool is returned to the magazine, the CNC does not stop even if tool breakage is detected and a part program continues to be executed after the completion of the tool breakage detection cycle. Therefore, it is necessary to judge if the tool is broken or not in a part program and follow the necessary processing if a tool is found to have been broken. The result of the tool breakage detection cycle is set for system variable VOK1. VOK1 = 1: Tool has not been broken. VOK1 ≠ 1: Tool has been broken. If a measurement impossible alarm occurs, whatever setting is made for PGO, the CNC is alarm-stopped after the automatic tool breakage cycle is completed.
CAUTION
1) Setting “PGO = 1” is not allowed with MC-V and double-column machining centers. This setting can cause interference between the tool or the tool change arm and the work­piece if a tool change cycle starts after an automatic tool breakage detection cycle.
2) Setting “PGO = 2” is not allowed for MC-H. This setting can cause interference between the tool or the spindle and the workpiece in Y- or X-axis movement that follows an auto­matic tool breakage detection cycle.
Page 89
4297-E P-78
SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
(12) PRS (P
RS) When using a special tool, a boring bar for example, the tool bit can fail to contact the touch sensor if the spindle is orient stopped at the preset position. In such cases, it is necessary to index the spindle to the desired angular position. PRS is used to set the desired spindle index angle for such cases. Example:In the case of the tool shown below, set “270” for PRS to index the spindle to allow tool bit to contact the touch sensor.
Tool
Y+
Y-
Sensor
Execute “CALL OO30 PRS = 270”
EIOEMR5S1045R01
Y-Y+
[Supplement]
Spindle orientation is automatically executed at the travel end of the Z-axis in the positive direction.
(13) PRET (P RETRACT)
With the retract type touch sensor, the sensor retracts after the completion of a cycle. If “1” is set for this variable, the cycle completes with the sensor at the advanced position.
(14) PH/PD
• Offset data (tool length offset data, cutter radius compensation data) are usually set and ref-
erenced for the offset number identical to the actual tool number. By setting PH and/or PD, the offset data can be set for the desired offset number. PH: Tool length offset number (default: actual tool number) PD: Cutter radius compensation number (default: PH number)
• Setting range: 1 to The number of tool data sets
EIOEMR5S1046R01
[Supplement]
Even when only cutter radius compensation is executed, it is necessary to set both PH and PD since the tool length offset data is also referenced.
Page 90
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SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
(15) VLTL (Maximum tool length)
The maximum tool length VLTL, used for the automatic tool offset and automatic tool breakage detection cycles, is added to the system parameters. The operational step 4) in Fig. 1-1 Cycle Time Reduction Function on page 28 becomes valid according to the setting for this parameter:
• Optional parameter (bit) No. 36, bit 3
1: Valid 0: Invalid (initial setting)
• Optional parameter (long ward) No. 44: Max. tool length data
For the maximum tool length, set the maximum tool length among the tools that will be used. Setting range: 0 to 999 Unit: mm Initial setting: 0 (may be changed)
CAUTION
Because the initial setting for the maximum tool length is “0”, an appropriate value must be set for VLTL.
(16) PUDT (Undertravel distance (Safety clearance))
When a tool is moved towards the sensor, its feedrate is switched from a high speed to a low speed. The position where the feedrate is switched is set for this variable in terms of the dis­tance from the sensor to the tool nose. See Fig. 1-1 Cycle Time Reduction Function on page 28. Designate this variable when calling the subprogram. If PUDT is not set, the following value is regarded as the undertravel distance.
• Automatic tool length offset cycle
Both PLI and PFA are designated: 50 mm Either PLI or PFA is not designated: 10 mm
• Automatic tool breakage detection cycle
Undertravel distance: 5 mm
(17) POVT (Overtravel distance (Sensor damaging prevention distance))
This is provided to prevent breakage of the sensor if the sensor fails to function when the tool contacts it. Set the distance from the assumed sensor contact position to the position where axis feed should stop if the sensor fails to operate. Designate this variable when calling the subprogram. If POVT is not set, “10 mm” is automati­cally set for it.
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SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION

7. Cautions on Operation

4297-E P-80
(1) Because the sensor will not work properly if its zero point is not set, be sure to set the sensor
zero point by executing the sensor zero point setting cycle when the machine is installed. For MCM, the zero point setting cycle must be executed for the horizontal spindle touch sensor.
• The sensor zero point is set for system work coordinate system No. 1 (Z-axis sensor) and
system work coordinate system No. 4 (Y-axis sensor).
• System work coordinate systems No. 1 and No. 4 are exclusive to automating specifications
and can neither be set by parameter setting nor referenced.
• System work coordinate systems No. 1 and No. 4 can only be checked by displaying the
MSB ZERO OFFSET (VSZO✽[N]) pop-up window in the GAUGING RESULT display screen.
(2) When setting “PGO = 2” with MC-V or a double-column machining center, make sure that the
tool change position setting cycle has been executed. The tool change position for the automatic tool breakage detection cycle is set for system work coordinate system No. 2. System work coordinate system No. 2 is exclusive to automating specifications and can neither be set by parameter setting nor referenced.
(3) An emergency stop limit switch is built into the system to protect the touch sensors. This limit
switch stops axis movement if a sensor is pushed in too far. If this happens, the emergency stop limit indicating lamp in the control panel lights up. To release the emergency stop condition, select the manual mode, set the emergency stop limit release switch to valid, and retract the sensor by moving the axis with the pulse handle in the direction in which the limit switch is released.
(4) Do not call out the automatic tool length offset or automatic tool breakage detection subprogram
while there is a remaining shift amount in manual interruption operation or while the machine is still in the mirror image mode. If a subprogram call is attempted, a “measuring impossible” alarm occurs.
Eeoemr5s1085
(5) As the automatic tool length offset and automatic tool breakage detection functions are used in
combination with the tool management function, the operator must become fully acquainted with the tool management function by reading its manual thoroughly before using these func­tions.
(6) The explanations in this manual relate to tools that have the cutting nose at the front edge, such
as drills, taps and reamers. For tools whose cutting edge is off the center of the spindle, like boring bars, variables PRS and PX or PY must be set in accordance with the tool nose offset direction.
(7) The automatic tool length offset and automatic tool breakage detection functions cannot be
used for tools whose tool holder comes into contact with the touch sensor or touch sensor unit before the tool nose does.
(8) Numerical values must be assigned to subprograms in the presently used unit system.
Note that the real number unit system must not be used.
(9) The cutter radius compensation mode and the local coordinate system are cancelled when an
automatic tool length offset or automatic tool breakage detection subprogram is executed and, once cancelled, they are not restored after the completion of the subprogram.
(10) Call automatic tool length offset and automatic tool breakage detection subprograms in a work
coordinate system. An alarm occurs if a subprogram is called in the machine coordinate sys­tem. Note that a work coordinate system cannot be altered during the execution of an automatic tool length offset or automatic tool breakage detection subprogram.
(11) Do not use the user area as the area for storing programs, work coordinate systems, tool offset
data and common variables, automatic tool length offset or automatic tool breakage detection subprograms.
Page 92
4297-E P-81
SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
(12) The allowable number of nesting levels of subroutines in an automatic tool length offset or tool
breakage detection subprogram is two. This means that the maximum allowable nesting level is six when these functions are executed.
(13) Manual advance/retraction operation of the tool breakage detection unit (touch sensor)
With MCM and MCR, the touch sensor can be manually moved forwards and backwards.
a) Set the CNC operation panel mode selecting key-lock type switch to ON to enable indepen-
dent manual operation.
b) Set the selector switch to FORWARDS.
c) Press the CYCLE START button.
The cover will open and the touch sensor will move forward when the CYCLE START button is released.
d) Set the selector switch to BACKWARDS.
e) Press the CYCLE START button.
The touch sensor will move backward and the cover will close when the CYCLE START but­ton is released.
f) Set the CNC operation panel mode selecting key-lock type switch to OFF to disable inde-
pendent manual operation.
(14) An alarm usually occurs if the actual tool number is “0” when a tool length offset or cutter radius
compensation cycle is executed. Therefore, you are recommended to carry out a tool change in the MDl or automatic mode in this case.
Page 93
SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION

8. Program Examples

8-1. Automatic Tool Length Offset

4297-E P-82
• Relative offset type
T2
N1 T2
N2 M6
N3 T6
N4 CALL OO30VFST=1(PLI=40)(PF1=1000) .............Tool length offset cycle for T2
N5 M6 PLI ................................................................... Anticipated tool length (relative length)
N6 T5 PF1 ...................................................................
N7 CALL OO30 PY=30
N8 M6 PY
.....................................................................
:
:
................................................
T6
PY=30
Boring barDrill
in reference to the standard tool
First approach feedrate
Tool length offset cycle for T6
Tool nose offset amount from the
spindle center (Y direction) = 30 mm
Eeoemr5s1086
EIOEMR5S1047R01
EIOEMR5S1048R01
Page 94
4297-E P-83
SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
• Absolute offset type
N1 T2
N2 M6
N3 T6
N4 CALL OO30 VFST=#81H (PLI=240) (PF1=1500) ...... Tool length offset cycle for T2
N5 M6 PL1 ........................................................................ Anticipated tool length
(absolute length)
N6 T5
N7 CALL OO30 PY=30 ......................................................Tool length offset cycle for T6
N8 M6
:
:
EIOEMR5S1049R01
Commands in ( ) may be omitted. It is not necessary to set variable VFST every time a tool length offset cycle is called. As has been explained, the touch sensor zero point must be set before the execution of an automatic tool length offset cycle. For the setting of the touch sensor zero point, select the same offset type (relative or absolute) as the type used for the automatic tool length offset cycle.
Page 95
SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION

8-2. Automatic Tool Breakage Detection

4297-E P-84
• Alarm stop
Eeoemr5s1087
T3
PY=30
Boring bar
EIOEMR5S1050R01
N1 T1 ..............................T1: Drill
N2 M6
N3 T3 ..............................T3: Boring bar
N4 S300
N5 G81 G56 X40 Y20 Z-30 R3 F80 H1
:
:
:
N12 CALL OO30 VFST=0 (PLE1=0.2)*1 (PLE2=0.05) .. Tool breakage detection cycle for T1
N13 M6
N14 T2 PLE1 ................................................................... Tool breakage judgment value
= 0.2 mm
N15 G0 X30 Y10 .............................................................. If no tool breakage judgment value is
set, "0.1 mm" is automatically set as
the tool breakage judgment value.
:
N29 CALL OO30 PY=30 (PLE1=0.1) ...............................Tool breakage detection cycle for T3
Off-center amount of tool nose:
30 mm
:
:
:
Commands in ( ) may be omitted.
EIOEMR5S1051R01
Page 96
4297-E P-85
SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
When the tool is judged “broken”, i.e., when the measured tool length is smaller than the set tool breakage judgment value, the operation stops in an alarm state on completion of the cycle (Z-axis positioned at travel end in the positive direction).
*1: Tool length offset data is updated when variable “PLE2” is set.
When the tool length measured in the tool breakage detection cycle is 0.051 mm to 0.2 mm (the range set by “PLE1” and “PLE2”) shorter than the initial tool length measured in the auto­matic tool length offset cycle, the tool length offset data is automatically updated based on the tool length measured in the tool breakage detection cycle to compensate for the tool wear amount. When no “PLE2” data is set, the tool length offset data is not updated.
• Automatic spare tool selection (MC-H)
T3T1
PY=30
Drill
Boring bar
EIOEMR5S1052R01
Page 97
4297-E P-86
SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
N1 T1 ..............................T1: Drill
N2 M6
N3 T3 ..............................T3: Boring bar
N4 G0 X40 Y10 S300
N5 G56 Z40 H1* M3
:
:
:
N18 CALL OO30 VFST=0 (PLE1=0.1) PGO=2 ...... Tool breakage detection cycle for T1 Tool
breakage judgment value
= 0.1 mm
N19 IF [VOK1 NE 0] N999 ..................................... Jump to N999 if tool is judged "broken"
VOK1: Judgment for tool breakage
N20 M6
N21 T9
N22 G0 X100 Y20
N23 G56 Z20 H3 :
:
:
N42 CALL OO30 PY=30 PGO=2 ........................... Tool breakage detection cycle for T3
N43 IF [VOK1 NE 0] N999 ...................................... Tool breakage judgment value
= 0.1 mm
Tool nose offset amount from the spindle
center = 30 mm
:
:
N999 M60 ............................................................... Pallet change command
Part program for the next workpiece ....................... If a broken tool is called in this program,
a spare tool is automatically selected
rom the same tool group.
At the same time as the spare tool is
selected, the tool offset data is rewritten to
the offset data of the selected spare tool.
The cutter radius compen sation data is
rewritten also.
EIOEMR5S1053R01
It is not necessary to set variable VFST every time an automatic tool breakage detection cycle is called.
*: HA may be designated instead of H1. For details, refer to special specifications of the Operation
Manual.
Page 98
SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION

9. Alarm List

4297-E P-87
Name of Alarm Probable Cause Measures to Take
UNTENDED: gauging impossible (ALARM-B 2305)
UNTENDED: no subprogram function (ALARM-B 2311)
UNTENDED: tool breakage (ALARM-B 2309)
Direct of subscript (ALARM-B 2231)
UNTENDED: command missing (ALARM-B 2308)
Plus travel limit over (ALARM-B 2268)
At the end of the gauging impossible message, the cause code is displayed.
ALARM-B 2305 UNTENDED: gauging impossible××
↑
Cause code
An attempt is made to execute the tool breakage detection cycle although the corresponding specification is not sup­ported.
Tool breakage is detected in the tool breakage detection cycle.
Tool number is “0”. PH and/or PD setting is wrong.
• The PAT command value is out of
the specifiable range (outside the range 1 to 7).
• Wrong PAC command
• The PAT command is not desig-
nated although “1” is set for VFST, bit 6.
The value assigned to PLI is too large. Do not set a value larger than the maxi-
The value set for the zero point of the touch sensor is incorrect. The touch sensor zero point has been set in the relative offset type but mea­surement is executed in the absolute off­set type, or the touch sensor zero point has been set in the absolute offset type but measurement is executed in the rel­ative offset type.
Refer to the Gauging Impossible Cause Code List and eliminate the cause.
Check the VFST setting.
When a tool is changed manually, the active tool number must be set.
mum measurable tool length for PLI. For the allowable maximum length of the tool to be measured, refer to your final machine/control specifications.
Set the touch sensor zero point again. Be sure to use the same offset type (rel­ative/absolute) for the setting and mea­surement.
Eeoemr5s1088
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SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
Name of Alarm Probable Cause Measures to Take
Minus travel limit over (ALARM-B 2269)
Gauging Impossible Cause Code List <Alarm B 2305>
The value set for CNC optional parame­ter (long word) No. 43 (measurable mini­mum tool length) is too small.
The value assigned to PLI is too small. Do not specify a value smaller than the
The touch sensor zero point has been set in the relative offset type but mea­surement is executed in the absolute off­set type, or the touch sensor zero point has been set in the absolute offset type but measurement is executed in the rel­ative offset type.
Do not set a value smaller than the mini­mum measurable tool length for CNC optional parameter (long word) No. 43. For the minimum allowable length of the tool to be measured, refer to your final machine/control specifications.
minimum measurable tool length for PLI. For the maximum allowable length of the tool to be measured, refer to your final machine/control specifications.
Set the touch sensor zero point again. Be sure to use the same offset type (rel­ative/absolute) for the setting and mea­surement.
4297-E P-88
Code
(HEX)
1 A maker subprogram is called while
the machine coordinate system (H0) is selected.
2 The mirror image function is active. Cancel the mirror image function first. OO10
3 Manual shift amount (total) remains. Cancel the manual shift amount (total)
4 In the G11 mode (parallel or rotation
shift of a coordinate)
5 In the G51 mode (graphics enlarge-
ment/reduction)
6 T number is zero (0), or no tool is set. • Specify a T number.
7 Specified T number or PTLN com-
mand is larger than the maximum off­set number.
8 The power to the probe is not on when
the flash on cycle is attempted.
Probable Cause Measures to Take
Call a maker subprogram after select­ing a work coordinate system (G15 H1, for example).
to zero.
Cancel the G11 mode first. OO10
Cancel the G51 mode first. OO10
• Specify the PTLN command.
Specify a T number or PTLN com­mand within the allowable range.
Check the following:
• Is there any obstacle between the
receiver head and the probe?
Used Subpro-
grams OO10
OO30 OO50
OO30 OO50
OO10 OO30 OO50
OO30
OO30
OO15
9 The offset amount of the positioning
point for cycle start from the touch sen­sor zero point is greater than PCHK (only for Y and Z axes).
• Is the spindle index angle for the
probe correct?
• Does the receiver head flash?
When positioning the Y and Z axes, position them within the range of PCHK from the touch sensor zero point.
OO30
Page 100
4297-E P-89
SECTION 1 AUTOMATIC TOOL LENGTH OFFSET/AUTOMATIC TOOL BREAKAGE DETECTION
Code
(HEX)
A The touch probe microcomputer stays
on.
B The result of the touch probe test is
NG. The touch probe signal cannot be con­firmed.
C The touch probe contacts the work-
piece while it is being fed at a rapid approach feedrate (X-axis).
D The touch probe fails to contact the
workpiece while it is being fed at a middle approach feedrate (X-axis).
E The touch probe fails to contact the
workpiece while it is being fed at the final approach feedrate (X-axis). When using the FM type touch probe, signal reception is not correct.
F The proximity switch is not turned on
although the touch probe is brought into contact with a workpiece (X-axis).
10 The touch probe contacts the work-
piece while it is being fed at a rapid approach feedrate (Y-axis). When using the FM type touch probe, signal reception is not correct.
11 The touch probe fails to contact the
workpiece while it is being fed at a middle approach feedrate (Y-axis). When using the FM type touch probe, signal reception is not correct.
12 The touch probe fails to contact the
workpiece while it is being fed at the final approach feedrate (Y-axis). When using the FM type touch probe, signal reception is not correct.
13 The proximity switch is not turned on
although the touch probe is brought into contact with a workpiece (X-axis).
14 The touch probe contacts the work-
piece while it is being fed at a rapid approach feedrate (Z-axis). When using the FM type touch probe, signal reception is not correct.
Probable Cause Measures to Take
Used Subpro-
grams
Check whether chips are accumulating on the proximity switch.
Check the touch probe battery. OO10
With the FM type touch probe, recep­tion of signals is not correct.
• Gauging cycle start point
• PUDT setting
When using the FM type touch probe, signal reception is not correct.
• Gauging cycle start point
• POVT setting
Check the touch probe battery. OO10
Check if the touch probe has chat­tered.
Check the following:
• Gauging cycle start point
• PUDT setting
Check the following:
• Gauging cycle start point
• POVT setting
Check the touch probe battery. OO10
Check if the touch probe has chat­tered.
Check the following:
• Gauging cycle start point
• PUDT setting
OO10
OO10
OO10
OO10
OO10
OO10
OO10
OO10
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