Mitutoyo LSM-9506 User Manual

LSM-9506

No.99MBC032A3

SERIES No.544

Laser Scan

Micrometer

User's Manual

Read this User’s Manual thoroughly

before operating the instrument. After reading,

retain it close at hand for future reference.

CONVENTIONS USED IN USER'S MANUAL

Safety Precautions

To operate the instrument correctly and safely, Mitutoyo manuals use various safety signs (Signal Words and Safety Alert Symbols) to identify and warn against hazards and potential accidents.

The following signs indicate general warnings:

Indicates an imminently hazardous situation which, if not avoided, will result in serious

DANGER

WARNING

CAUTION

injury or death.

Indicates a potentially hazardous situation which, if not avoided, could result in serious injury or death.

Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury or property damage.

The following signs indicate specific warnings or prohibited actions, or indicate a mandatory action:

Alerts the user to a specific hazardous situation. The given example means “Caution, risk of electric shock”.

Prohibits a specific action. The given example means “ Do not disassemble”.

Specifies a required action. The given example means “Ground”.

No. 99MBC032A

CONVENTIONS USED IN USER'S MANUAL

On Various Types of Notes

The following types of notes are provided to help the operator obtain reliable measurement data through correct instrument operation.

IMPORTANT •An

of a task. You cannot disregard this note to complete the task.

• An important note is a type of precaution, which if neglected could result in a loss of data, decreased accuracy or instrument malfunction/failure.

NOTE A

TIP A tip is a type of note that helps the user apply the techniques and procedures described in

note

mation that may only apply in special cases (e.g.. Memory limitations, equipment configurations, or details that apply to specific versions of a program).

the text to their specific needs. It also provides reference information associated with the topic being discussed.

Mitutoyo assumes no liability to any party for any loss or damage, direct or indirect, caused by use of this instrument not conforming to this manual. Information in this document is subject to change without notice.

important note

emphasizes or supplements important points of the main text. A note supplies infor-

is a type of note that provides information essential to the completion

NOTES FOR EXPORTING

If you export this product, contact the nearest Mitutoyo sales office in advance.

No. 99MBC032A

PRECAUTIONS

CAUTION

1. Safety Precautions

The Mitutoyo Laser Scan Micrometer LSM-9506 uses a laser beam.

CAUTION

1) “This LSM conforms to the US CDRH regulations in 21 CFR 1040 for a class II laser product.”

2) Do not look directly into the laser beam. (Never look into the emission window, even when no light is emitted.)

3) Do not observe the laser beam directly through optical equipment, such as a magnifying lens.

4) When measuring flat objects with mirror finishes, avoid looking at the reflection on the surface.

5) Close the beam shutter when not in use.

6) Do not open the emission unit cover except for servicing. The output power when the cover is open is about 1.2mW.

7) Do not remove the “CAUTION” or “WARNING” labels.

8) The laser beam does not harm human skin when irradiating.

9) “CAUTION – Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.”

LASER LIGHT-DO NOT

STARE INTO BEAM

1mW-650nm

CLASS II LASER PRODUCT

2. If an optional device is to be connected to this system, make sure that the optional device is also turned off.

3. Firmly tighten the screws of the cable connectors and interfaces to ensure shielding.

4. Do not touch the terminals of the connectors, otherwise contact may be poor.

5. Positively ground the Display Unit.

6. An error display may appear during operation. However, it may not always indicate a fault. If an error display appears, consult the “Maintenance and Inspection” section.

Do not open the covers provided on the emission unit and reception unit.

iii

No. 99MBC032A

SAFETY PRECAUTION LABELS LOCATED ON LSM-9506

CAUTION-Laser Light

when open

DO NOT STARE INTO

BEAM

AVOID EXPOSURE-LASER RADIATION IS EMITTED FROM THIS APERTURE

Beam attenuator

CAUTION-Laser Light

when open

DO NOT STARE INTO

BEAM

CAUTION-Laser Light DO NOT STARE INTO

when open BEAM

No. 99MBC032A

CAUTION

LASER LIGHT-DO NOT

STARE INTO BEAM

1mW-650nm

CLASS II LASER PRODUCT

LASER EMISSION INDICATOR

LASER EMISSION

Complies_with_21_CFR_1040.10 Mitutoyo_Corporation

1-20-1,_Sakado, Takatsu-Ku,_Kawasaki-Shi, Kanagawa_213,_JAPAN

Manufactured:

INSTALLING CONDITIONS

The Mitutoyo Laser Scan Micrometer LSM-9506 is both a precision optical instrument and a precision electric instrument, and it is designed for indoor use. Therefore, it must be carefully installed and the following conditions must be taken into consideration to attain the highest possible accuracy.

1. Vibration Install this unit if possible in a place where it will not be subject to vibration. If this unit is used for a long period of time in an environment where there are significant vibrations, the precision parts in this unit may be affected, resulting in the deterioration of measuring accuracy.

If this unit has to be used in an environment where vibration is significant, measures such as the laying of a vibration damping rubber pad under the unit must be applied to reduce the effect of vibration.

2. Dust Dust and airborne particles at the installation site adversely affect optical parts including the protective glass and electronic parts of the Measuring Unit. Place this unit in a place with as little dust and as few airborne particles as possible.

3. Direct sunlight If this unit is subjected to direct sunlight, the heat may deform this unit and affect the measuring accuracy.

4. Ambient temperature and humidity

WARRANTY

If this unit must be placed by a window where it will be subjected to direct sunlight, protect the unit by shading it.

This unit must be operated in an environment where the temperature is between 0 and 40˚C and the humidity is between 35 and 85% RH. Avoid installing this unit where there is significant temperature or humidity change.

Significant temperature and humidity changes may reduce measuring accuracy.

In the event that the Mitutoyo Laser Scan Micrometer (LSM) should prove defective in workmanship or material, within one year from the date of original purchase for use, it will be repaired or replaced, at our option, free of charge upon its prepaid return to us.

If the unit fails or is damaged because of the following causes it will be subject to a repair change, even if it is still under warranty.

1. Failure or damage due to inappropriate handling or unauthorized modification.

2. Failure or damage due to transport, droppage, or relocation of the machine after purchase.

3. Failure or damage due to fire, salt, gas, abnormal voltage, or natural catastrophe.

This warranty is effective only where the machine is properly installed and operated following this manual.

No. 99MBC032A

CONTENTS

CONVENTIONS USED IN USER'S MANUAL ................................................................. i

NOTES FOR EXPORTING ............................................................................................... ii

PRECAUTIONS ...............................................................................................................iii

SAFETY PRECAUTION LABELS LOCATED ON LSM-9506........................................iv

INSTALLING CONDITIONS .............................................................................................v

WARRANTY......................................................................................................................v

1. INTRODUCTION................................................................................................... 1-1

2. SETUP .................................................................................................................. 2-1

3. DISPLAYS AND KEY OPERATIONS.................................................................. 3-1

1.1 Outline ........................................................................................................... 1-1

1.2 Foreword ....................................................................................................... 1-1

1.3 Nomenclature ................................................................................................ 1-2

1.3.1 Display Unit....................................................................................... 1-2

1.3.2 Measuring Unit.................................................................................. 1-3

2.1 Unpacking and Acceptance Check............................................................... 2-1

2.2 Connecting the Cables ................................................................................. 2-1

2.3 Preliminary Checks ....................................................................................... 2-3

2.4 Initializing the LSM-9506 .............................................................................. 2-5

3.1 Outline of the Operation Modes ................................................................... 3-1

3.1.1 Outline of the Operation Modes ....................................................... 3-1

3.1.1.1 Overview................................................................................. 3-1

3.1.1.2 Setting the segment ............................................................... 3-3

3.1.1.3 Measurement interval (measurement time) ........................... 3-4

3.1.2 Outline of the Operation Modes ....................................................... 3-5

3.1.2.1 Basic setup mode................................................................... 3-6

3.1.2.2 Calibration mode .................................................................... 3-6

3.1.2.3 Measuring condition setup mode ........................................... 3-6

3.1.2.4 Other setup mode................................................................... 3-6

3.1.2.5 Statistic display mode............................................................. 3-6

3.1.2.6 Measurement mode................................................................ 3-7

3.2 Techniques and Terminology of Setup Functions ........................................ 3-9

3.2.1 Program ............................................................................................ 3-9

3.2.2 Basic setup ....................................................................................... 3-9

3.2.3 Function setup ................................................................................ 3-10

3.2.4 Setups according to the property of each workpiece..................... 3-10

3.2.4.1 Transparent object (Workpiece that transmits light) ............ 3-10

3.2.5 Latch (holding) of the displayed value ........................................... 3-12

3.2.6 Automatic measurement with an edge specification...................... 3-13

3.2.7 GO/NG judgment ............................................................................ 3-14

3.2.8 Abnormal data elimination .............................................................. 3-16

3.2.9 Offset/Zero-set ................................................................................ 3-17

3.2.10 Mastering ........................................................................................ 3-17

3.2.11 Reference value.............................................................................. 3-18

3.2.12 Data output conditions .................................................................... 3-18

3.2.13 Automatic workpiece detection <OD detection method, Position

detection method> .......................................................................... 3-19

No. 99MBC032A

3.2.14 Group judgment .............................................................................. 3-21

3.2.15 Recording the amount of light ........................................................ 3-22

3.3 Outline of the Display Contents .................................................................. 3-23

3.3.1 Display unit ..................................................................................... 3-23

3.3.2 Data display unit ............................................................................. 3-23

3.4 Outline of Key Operations .......................................................................... 3-25

3.4.1 Description of key functions ........................................................... 3-27

3.4.2 Example key operations ................................................................. 3-31

4. SETTING UP THE MEASURING CONDITIONS ................................................. 4-1

4.1 Basic Setup ................................................................................................... 4-1

4.1.1 Outline of the basic setup procedure ............................................... 4-2

4.1.2 Description of each mode................................................................. 4-3

4.1.2.1 Selecting and setting the function in the B0 mode ................ 4-4

a. Setting the resolution (Guidance: RES) ............................ 4-4

b. Setting the number of blank-out digits (Guidance: BLN) .. 4-4 c. Putting a comma after the thousandths digit

(Guidance: (,)) ................................................................... 4-5

d. Setting the buzzer function (Guidance: BUZZER) ............ 4-5

e. Setting the display latch timer (Guidance: LATCH) .......... 4-6

4.1.2.2 Selecting and setting the function in the B1 mode ................ 4-7

a. Setting the output function in the ready state

(Guidance: D.OUT) ............................................................ 4-7

b. Selecting the display message if Err-0 occurs

(Guidance: ERR-0 D) ........................................................ 4-7

c. Selecting the display message at the start of

measurement (Guidance: RUN D) .................................... 4-7

d. Selecting the averaging method (Guidance: AVG.M)....... 4-8

e. Setting the GO/NG judgment method

(Guidance: JDG.M) ............................................................ 4-8

f. Setting whether the target value is copied to the

reference value (Guidance: COPY) .................................. 4-8

4.1.2.3 Selecting and setting the function in the B2 mode ................ 4-9

a. Setting the workpiece type (Guidance: WORK.P) ............ 4-9

b. Setting the simultaneous measurement

(Guidance: PROG) ............................................................ 4-9

c. Selecting the method of specifying segments

(Guidance: SEG) ............................................................... 4-9

4.1.2.4 Selecting and setting the function in the B3 mode .............. 4-10

a. Setting the abnormal value elimination function

(Guidance: ADE) ............................................................. 4-10

b. Setting the automatic workpiece detecting function

(Guidance: AWDT) .......................................................... 4-10

c. Setting the number of scans (Guidance: SCAN) ............ 4-10

d. Setting the group judgment (Guidance: GTJ) ................. 4-11

e. Setting the group judgement output

(Guidance: GTJ D) .......................................................... 4-11

4.1.2.5 Selecting and setting the function in the B4 mode .............. 4-12

a. Setting the use of RS-232C port

(Guidance: RS-232C) ...................................................... 4-12

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No. 99MBC032A

b. Setting the RS-232C communication baud rate

(Guidance: BAUD)........................................................... 4-12

c. Setting the RS-232C communication data bits

(Guidance: LENGTH) ...................................................... 4-12

d. Setting the RS-232C communication parity bit

(Guidance: PARITY)........................................................ 4-13

e. Setting the delimiter for communication

(Guidance: DELIMT) ........................................................ 4-13

f. Setting the RS-232C line control

(Guidance: CONTRL) ...................................................... 4-13

4.1.2.6 B5: Reserved........................................................................ 4-14

4.1.2.7 Selecting and setting the function in the B6 mode .............. 4-14

a. Setting the use of DCU (Guidance: DCU) ...................... 4-14

4.2 Calibration ................................................................................................... 4-15

4.2.1 Calibration gages and gage stand ................................................. 4-15

4.2.2 Entering the calibration mode......................................................... 4-15

4.3 Positioning a Gage or a Workpiece............................................................ 4-19

4.4 How to read-in the amount of light ............................................................. 4-19

4.5 Setting Up the Functions ............................................................................ 4-20

4.5.1 Outline of the function setup mode ................................................ 4-20

4.5.2 Outline of each function setup mode ............................................. 4-22

4.5.3 Function setup mode ...................................................................... 4-23

4.5.3.1 F0: Setting the segment ....................................................... 4-23

4.5.3.2 F1: Setting the measurement interval

(measurement time) ............................................................. 4-25

4.5.3.3 F2: Setting the GO/NG judgment criteria............................. 4-27

4.5.3.4 F3: Setting the reference value............................................ 4-31

4.5.3.5 F4: Setting the offset value .................................................. 4-32

4.5.3.6 F5: Setting the data output conditions ................................. 4-34

4.5.3.7 F6: Setting the sample measurement .................................. 4-35

4.5.3.8 F7: Automatic workpiece detection setting .......................... 4-36

4.5.3.9 F8: Setting the group judgment ............................................ 4-37

4.5.3.10 Confirming the function setup contents................................ 4-38

No. 99MBC032A

5. MEASUREMENT MODE ...................................................................................... 5-1

5.1 Outline of the Measurement Mode ............................................................... 5-1

5.1.1 Setup in the measurement mode ..................................................... 5-1

5.1.1.1 Setup operation from the arrow key....................................... 5-2

5.1.1.2 Setup that can be made directly from each setup item key .. 5-4

5.2 Other Functions ............................................................................................ 5-5

5.2.1 Key lock ............................................................................................ 5-5

5.2.2 Displaying the measuring position .................................................... 5-5

5.3 Applied Measurement ................................................................................... 5-6

5.3.1 OD measurement of a precision-machined workpiece .................... 5-6

5.3.2 Measurement of magnet coil wire that runs at high speed.............. 5-7

5.3.3 Measurement of the lead pitch of a multiple-pin IC ......................... 5-8

5.3.4 Applied Measurement with Offset/Zero-Set Functions................... 5-10

5.3.5 Sample measurement..................................................................... 5-13

5.3.6 Applied measurement with automatic workpiece detection ........... 5-15

5.3.7 Applied measurement on a stepped round bar .............................. 5-17

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6. INTERFACE UNIT ................................................................................................ 6-1

6.1 RS-232C Interface ........................................................................................ 6-1

6.1.1 Specifications.................................................................................... 6-1

6.1.2 Connections ...................................................................................... 6-3

6.1.3 Printer interface ................................................................................ 6-5

6.1.3.1 Setting the printer ................................................................... 6-5

6.1.3.2 Setting the LSM-9506............................................................. 6-6

6.1.4 RS-232C commands ........................................................................ 6-6

6.1.5 List of commands ............................................................................. 6-8

6.1.6 List of response commands if an error occurs............................... 6-10

6.1.7 Format of response commands...................................................... 6-11

6.1.8 Other commands ............................................................................ 6-12

6.1.9 Details of command descriptions ................................................... 6-13

6.1.10 An example Program of RS-232C Communication ....................... 6-21

6.2 Digimatic Output Unit interface ................................................................... 6-22

6.2.1 Method of use................................................................................. 6-22

6.2.2 I/O specifications ............................................................................ 6-23

6.2.3 Timing chart .................................................................................... 6-24

6.2.4 Data format ..................................................................................... 6-25

7. INSPECTION AND MAINTENANCE.................................................................... 7-1

7.1 Display Unit ................................................................................................... 7-1

7.1.1 Display check.................................................................................... 7-1

7.1.2 Cleaning method............................................................................... 7-1

7.2 Measuring Unit .............................................................................................. 7-2

7.2.1 Cleaning optical parts ....................................................................... 7-2

7.2.1.1 Checking method of the reception signal using an oscilloscope .... 7-2

7.2.2 Replacement of protection glass ...................................................... 7-2

7.3 Error Messages and Remedies .................................................................... 7-3

7.4 Troubleshooting and Remedies .................................................................... 7-4

7.5 Fuse replacement ......................................................................................... 7-5

8. SPECIFICATIONS ................................................................................................ 8-1

8.1 Specifications ................................................................................................ 8-2

9. RESTRICTIONS ASSOCIATED WITH THE COMBINATION OF FUNCTIONS,

TABLES OF THE BASIC SETUP MODES ......................................................... 9-1

9.1 Restrictions Associated with the Particular Combination of Functions ........ 9-1

9.2 List of Setup Modes ...................................................................................... 9-3

9.2.1 List of basic setup modes................................................................. 9-3

9.2.2 List of calibration functions ............................................................... 9-4

9.2.3 Reading in the amount of light ......................................................... 9-4

9.2.4 List of function setup modes ............................................................ 9-5

SERVICE NETWORK

No. 99MBC032A

INTRODUCTION

1.1 Outline

This system is an accurate, non-contact measurement system capable of measuring workpiece dimensions at a high speed using a highly directional scanning laser beam.

This non-contact optical measuring system is capable of measuring workpieces which are difficult to measure with conventional measuring instruments. It performs simple and accurate measurement of brittle or elastic objects, objects at high temperature, objects which must be kept clean, and soft objects which may be deformed and suffer dimensional changes under the measuring forces used.

1.2 Foreword

This chapter describes the Laser Scan Micrometer (LSM) models and nomenclature of the Display unit and the Measuring unit.

WARNING

The Measuring Unit uses a laser. For safe operation, carefully read and follow the “Safety Precautions on Use of Laser” section described in the user’s manual that is supplied with each Measuring Unit.

The LSM-9506 is classified into two types, the mm/E type and mm/inch type. This User’s Manual explains about the mm/E type. In case of using the mm/inch type, read this User’s Manual with replacing the “E” indication with “inch (in)”.

No. 99MBC032A

1 - 1

1.3 Nomenclature

This section gives the name of each part in the LSM system.

1.3.1 Display Unit

(1) Front panel

(2) Displays and keys

Mitutoyo

LASER SCAN MICROMETER LSM-9506

LASER EMISSION

Power switch

SHIFT

READ

Workpiece Position indicator LED

Data display

PROG.

LOCK CAL OFFSET S.E DUAL

+NG

–NG GO

BUSY

RUN

Status indicator LEDs (lit/unit)

Laser Emission indicator LED

RUN

C.RUN

S.PR

SET

Operation keys

RUN

SHIFT

READ

H.CAL

L.CAL

LOCK

UNIT

C.RUN

•0

A.CL M.CL

S.PR

+/-

STAT

S.E

SET

LIMIT

MASTER OFFSET

REF

ENT

1 - 2

H.CAL

L.CAL

LOCK

UNIT

•0

A.CL

M.CL

+/-

STAT

S.E

LIMIT

MASTER

OFFSET

REF

ENT

No. 99MBC032A

(3) Rear panel

AC power inlet

Fuse holder

GND terminal

1. INTRODUCTION

Serial number label

Scanning signal connector

Digimatic output connector

TIP The terminal located at the left end of the power input terminal and marked (by a

symbol or ) is the grounding terminal to keep the potential of signal line of this unit equal with other instrument connected. It is used to enhance resistance against electrical interference.

1.3.2 Measuring Unit

(1) Measuring Unit

Emission unit

Foot switch

RS-232C connector

Remote interlock connector

Emission window

Reception window

Shutter

Reception unit

No. 99MBC032A

Display unit

1 - 3

MEMO

1 - 4

No. 99MBC032A

SETUP

This chapter describes the connection between the Display Unit and Measuring Unit.

2.1 Unpacking and Acceptance Check

Your LSM has been thoroughly inspected prior to shipment. The mechanical, electrical, and optical systems are guaranteed to operate properly.

Unpack the package and check that the main unit is not damaged, and all the accessories listed are present.

Contact Mitutoyo if anything is damaged or missing.

2.2 Connecting the Cables

Make sure that the power switch is turned off (turn the key switch counterclockwise to align with “O”, then pull it out), then connect the cables according to the following procedure.

Step 1: Connecting the power cord and GND lead wire

Connect the supplied power cord to the AC connector on the rear panel of the main unit. Also be sure to ground the main unit with the GND lead wire for improved resistance to noise.

Grounding must be done properly: Connect the supplied grounding wire, after cutting it to the minimum length, to the grounding terminal provided on the Display Unit. This unit operates as a precision analog processor and, at the same time, a high-speed calculation unit. To enhance resistance against electrical interference and to increase safety, do not neglect grounding.

No. 99MBC032A

2 - 1

Step 2: Checking the remote interlock connector

(

)

Make sure that the short-circuiting pin is inserted into the “REMOTE INTERLOCK” connector on the rear panel of the Display Unit. If this short-circuiting pin is not inserted, laser emission is disabled, even if the power switch is on.

To emergency stop laser emission, refer to the following diagram.

Switch ON: Laser emission ON Switch OFF: Laser emission OFF

Short-circuiting pin

Switch

5V, 3mA

Applicable connector: PJ-2

Manufacturer: Sato Parts

Step 3: Connecting the interface

For information about the procedure used to connect the interface, refer to Section

6.1, “RS-232C Interface” and Section 6.2, “Digimatic Output Unit Interface”.

IMPORTANT Note the following when making cable connections.

Always make connection or disconnection with the power cord unplugged. In addition, before connecting to the interface make sure that the power to all other units connected or to be connected are also off.

Do not disassemble this unit. This unit is a precision instrument. Should it be disassembled by the user, its accuracy can not be guaranteed even within the term of its warranty. And, there will be a charge for repairs.

Observe the following to avoid electric shock.

1. Do not remove the protective cover on which the seal is stuck to. Otherwise, an

electric shock may result.

2. Do not remove the seal, shown at the left.

2 - 2

No. 99MBC032A

2.3 Preliminary Checks

The necessary connections should be completed by following the procedure described in the previous chapter. Simplified operation checks are described here.

Step 1: Fully open the lens cap and shutter of the Measuring Unit.

Fully open the lens caps and beam shutters of both the emission unit and reception unit to ready the laser beam for emission. The lens caps should be completely removed, and the shutters should be as shown in the diagram below.

If the shutter is closed If the shutter is open

Step 2: Power on

• Turn the power key switch on the Display Unit clockwise until it is in the I (power on) position and the power is on.

• This unit enters the self check mode and all the LEDs and segments turn on. They will turn off shortly, and eights will be displayed in the upper display section.

When is displayed across the upper display section, the unit will turn off shortly. This is followed by the self check on the lower display section.

2. SETUP

Emission window Shutter window

Shutter

PROG PROG

PROG

• In the lower display section eights will appear sequentially from the left to right.

• After is displayed across the lower display section, it will turn off shortly.

PROG PROG

• Measurement is started. The LASER EMISSION LED turns on and the BUSY LED starts flashing to indicate the measurement has started from the ready state.

Since the objective segment has been set to

PROG

“SEG 1” at the factory, the displayed measurement shows the laser scanning range of the Measuring Unit.

Here, the Display Unit is found to be normal because the scanning range is displayed. Proceed to Chapter 3, “FUNCTIONS AND KEY OPERATIONS”, to custom set up each function.

No. 99MBC032A

2 - 3

• An error may be displayed at this stage,

PROG

however, the display at the right is not actually an error. Check the shutter of the Measuring Unit. For information about other errors that may result refer to Section 7.3, “Error Messages and Remedies”.

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No. 99MBC032A

2.4 Initializing the LSM-9506

After making sure that this unit is operating normally, initialize the LSM-9506. The initialization procedure is as follows: Step 1: Turn off the power.

2. SETUP

Step 2: Turn on the power while holding down the

Hold down the

Step 3: When the self check has been completed, the

display shown at the right will appear. To initialize, press the process has been completed, the display restores the initial conditions that existed just after the power on. To abort initialization press a key other than the In the former case the initialization process will be aborted and the initial display at power-on will be restored.

key for approximately 2 seconds, even after the power is on.

key. When the initialization

ENT

key.

PROG

key or turn the power off.

ENT

IMPORTANT Initialization will clear all the customer setup data and will restore the factory-setups.

Customize the setups again as necessary.

No. 99MBC032A

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MEMO

2 - 6

No. 99MBC032A

DISPLAYS AND KEY

OPERATIONS

This Display Unit is provided with many useful functions that can be customized according to the user's needs.

This chapter describes these functions and key operations.

3.1 Outline of the Operation Modes

3.1.1 Outline of the Operation Modes

In order for the user to understand the measurement principle of the LSM, the following paragraphs describe about the system block diagram, segments (measurement positions) and measurement interval (measurement time).

3.1.1.1 Overview

Unlike light emitted from natural sources, a laser provides extremely fine, rectilinear beams which do not diffuse (coherent light beams).

Using the properties of the laser beam, the Mitutoyo Laser Scan Micrometer (LSM) moves a scanning laser beam over the workpiece and determines its dimensions by measuring the duration in which the beam is obstructed by the workpiece.

No. 99MBC032A

Emission unit Reception unit

Polygon mirror

Laser power source Semiconductor laser

Motor driving pulse

CPU

Motor Colimator lens

Clock pulse

ROM RAM

Data display

Keyboard

Counter

RS-232C

Photoelectric element (reset signal generation)

Digimatic Out-

Gate Edge signal

put Unit I/F

Workpiece

Segment selection circuit

Foot switch

Condenser lens

Amplifier

ttt

Edge signal

Reception device S

3 - 1

The configuration of the system is shown in the block diagram described in the previous page. A laser beam emitted from the laser oscillator is directed at the polygon mirror which rotates at high speed and is synchronized by clock pulses. The laser beam that is reflected by the polygon mirror is then collimated by the collimator lens towards the workpiece. As the polygon mirror rotates, this horizontal beam scans the workpiece and the beam not obstructed by the workpiece will reach the photoelectric element through the condenser lens and induce an output voltage in the photoelectric element. The output voltage will change according to the duration over which the laser beam is obstructed. Counting pulses generated during that period are used to determine the dimension of the obstructed portion. This data is sent to the CPU for processing and the dimensions are displayed digitally.

Consequently, either the dimensions of the workpiece (shadowed areas) or workpiece clearances (highlighted areas) can be determined by specifying the segments to be measured.

TIP In the above system block diagram, the laser beam passed through the collimator

lens is made parallel and, at the same time, stopped down so that the beam diameter is minimized at the measurement position.

3 - 2

No. 99MBC032A

3.1.1.2 Setting the segment

Set the objective portion of a workpiece to be measured. The highlighted and shaded portions created when the laser scans over the workpiece are

controlled with each assigned number. In the basic setup a selection must be made from one of two cases: case where there are 1 to 4 highlighted and shaded sections, and case where there are 1 to 127 similar sections. In the former case the portions are controlled through the segment number, and are simply called segments. In the latter case the portions are controlled by the edge number (edge number is between 1 and 255) and called edges. Edge numbers equal to or greater than 256 are not available.

3. DISPLAYS AND KEY OPERATIONS

Segment specification

Highlight 1 Shade 1 Highlight 2 Shade 2 Highlight 3

Direction of laser scanning

Shade 3 Highlight 4

SEG1 SEG2 SEG3 SEG4 SEG5 SEG6 SEG7

• A maximum of 4 highlighted sections and a maximum of 3 shaded sections can be measured.

• Multiple segments can be specified at the same time.

• Specify segments 1 to 3 for a transparent object.

Edge specification

EDGE1

Highlight 1

Shade 1 Highlight 2 Shade 2

Highlight 127

Direction of laser scanning

Shade 127 Highlight 128

EDGE2 EDGE3

EDGE4 EDGE5

EDGE254 EDGE255

EDGE256

• A maximum of 127 highlighted sections and a maximum of 127 shaded sections can be measured.

• Always specify the start edge and finish edge numbers. These two edges can be either continued or separated. However, they must not be identical.

• Edge numbers can not be specified for a transparent object.

• If automatic measurement is specified in the basic setup, intervals, outside diameters, or gaps between the same shape of multiple pins can be automatically measured.

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3.1.1.3 Measurement interval (measurement time)

A measurement interval (measurement time) varies depending on the averaging method and the number of scans selected for the measurement data.

There are two types of averaging method: the arithmetical average and the moving average. Select the one best suited for the user’s purpose.

1) Arithmetical average

• If a moving workpiece is measured, the OD of the workpiece is determined by averaging the measured data taken from each section (a: first measurement, b: second measurement,

.... n: nth measurement) of the workpiece the specified number of averaging times, as

shown below.

2) Moving average

first measurement

second measurement

ban

Moving workpiece

. . .

nth measurement

Moving direction

• One of the following number of averaging times can be selected: 1, 2, 4, 8, ....1024, 2048.

(If extra fine wire measurement is specified in the basic setup, the number of averaging times can be selected from between 16 and 2048.)

• This is suitable for measuring a still object or the run-out of rollers, etc.

In the moving average method, a measurement interval identical to that in the arithmetical average is divided into finer sections such as a1 (1st measurement), a2 (2nd measurement), -

- - , an (nth measurement). Each measurement is performed almost in parallel. If, for ex-

ample, the number of averaging times is set to 512, the first measurement requires the amount of time that corresponds to 512 scans. However, for the second measurement onward, only the time for 16 scannings is required. With respect to a workpiece with a changing OD, this method provides data with smooth variation because of the many pieces of data, and also quickly detects the trend of workpiece OD variation.

Measurement with

arithmetical averaging

Measurement with

arithmetical averaging

3 - 4

. . .

Moving workpiece

an measurement

. . .

a2 measurement a1 measurement

Moving direction

Output of an measurement Output of a2 measurement Output of a1 measurement

• One of the following number of scans can be selected: 32, 64, 128, ....1024, 2048.

• This method is suitable for the feedback control of wire drawing machines and extruding machines.

No. 99MBC032A

3.1.2 Outline of the Operation Modes

The LSM system has the following modes: 1: Basic setup mode, 2: Calibration mode, 3: Function setup mode, 4: Other setup mode, 5:

Statistical result display mode, and 6: Measurement mode.

3. DISPLAYS AND KEY OPERATIONS

Power ON

LOCK

4: Other setup mode

5 : Statistical result display mode

Error check

SET

6 : Measurement mode

, ,

ENT

UNITUNIT

LOCK

( )

UNIT

Ready state

RUN

Measurement in progress (Program being executed)

C.RUN

LOCK

SHIFT

H.CAL L.CAL

ENT

• Single-run measurement

SHIFT

S.PR

• Continuous-run

• measurement

( )

RUN

SET

•

LIMIT

• , , ,

Measured data display (Latched display)

S.PR

SET

( )

• Latch timer

• @

SET

•

• ( , , )

Power ON +

SET

1 : Basic setup mode

2 : Calibration mode

( , )

H.CAL L.CAL

MASTER OFFSET

REF

SHIFT

3 : Function setup mod

MASTER

LIMIT

OFFSET

REFENT

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3.1.2.1 Basic setup mode

• This mode is used to customize the basic setup conditions, including the resolution, interface conditions, and available functions, according to the measurement requirements. For more information, refer to Section 4.1, “Basic Setup”.

• To enter the basic setup mode turn on the power (turn the key switch clockwise from the “O” position to the “I” position) while holding down the key for about 2 seconds to initiate the basic setup mode.

3.1.2.2 Calibration mode

• Depending on the environment in which the LSM is used, measurement errors may result. Therefore, always perform calibration prior to use, taking the measuring range and environmental conditions into account. If calibration is performed, the errors described above will be reduced and high accuracy will be ensured.

• Before performing calibration, always make the setups for resolution, simultaneous measurement and available segments in the basic setup mode. If this order is reverse, the previously set calibration values may be discarded.

• For more information, refer to Section 4.2, “Calibration”.

• Press the

key to enter the HI CAL mode; and press the

H.CAL

CAL mode.

3.1.2.3 Measuring condition setup mode

key. Hold down the

SET

key to enter the LOW

L.CAL

SET

• This mode is used to set up measuring conditions, including segments (objective portion of workpiece to be measured) and GO/NG judgment criteria.

• Press the

• Each of the setup item to be established.

• Press the key to enter the setup operation for the setup item which is used most often.

3.1.2.4 Other setup mode

• This mode is used to set the key lock and to set the unit of measurement.

• Press the

LOCK/UNIT

• Press the

3.1.2.5 Statistic display mode

• Displays the statistical processing results.

• Press the

• Press the results to be printed.

key to enable all the function setup items established to be set in a batch.

SET

LIMIT,SHIFT,MASTER/OFFSET

SHIFT

and

LOCK/UNIT

key to turn on and off the key lock; and press only the

, and

keys allows the individual function

REF

key to enter the unit change mode.

SHIFT

and

and and

key to enter the measuring position display mode.

READ

STAT/S.E

S.PR/PRINT

keys in the ready state to enter the statistic display mode. keys in the ready state to allow the statistical processing

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No. 99MBC032A

3.1.2.6 Measurement mode

This mode can be divided into the following operational states:

1) Measurement in the ready state

• This is the measurement mode that is entered immediately after the power is turned on or if another measurement mode is aborted by pressing the command from the RS-232C interface).

• It is used to establish setups for calibration and available functions, which are not part of the basic setup items, or to enter another measurement mode including single-run measurement.

• Usually GO/NG judgment will not take place for measurement in the ready state, however, GO/NG judgment can be made in the basic setup mode.

• Measurements in the ready state are unavailable for statistical processing.

2) Single-run measurement

• If the one session of measurement is performed and the results will be automatically subject to GO/NG judgment. In addition, the measured data will be outputted for the RS-232C interface, Digimatic Output Unit interface, and printer. The measured data will be held (latched for the specified period) in the display.

• This data will be available for statistical processing.

3. DISPLAYS AND KEY OPERATIONS

key (or by the “CL”

key (otherwise input “R” command via the RS-232C interface) is pressed,

RUN

3) Continuous-run measurement

• If the

key (otherwise input “CR” command via the RS-232C interface) is pressed,

C.RUN

one session of measurement is started and repeated the specified number of times. The measured data will be automatically subject to GO/NG judgment. In addition, the measured data will be outputted for the RS-232C interface, Digimatic Output Unit interface, and printer.

• Press the sured data on the display. If the

RUN

key again to terminate the measurement and hold the mea-

C.RUN

key (or “CL” command via the RS-232C inter-

face) is pressed halfway, the measurement is aborted and the ready state is returned to.

• The measurements are available for statistical processing.

4) Zero-run measurement

• A measurement where the number of samples is set to “0” is called a “zero-run measurement”.

• If the pressed, single-run measurement is started and repeated until the

key (otherwise input the “R” command via the RS-232C interface) is

RUN

key is pressed again (or the “STOP” command is inputted via the RS-232C interface). From the measured data the calculation items (mean, maximum value, minimum value, and range) that have been set for the sample measurement will be calculated and the resulting data will be automatically subject to GO/NG judgment. In addition, the measured data will be outputted for the RS-232C interface, Digimatic Output Unit interface, and printer. The measured data will be held on the display.

• The measured data are available for statistical processing.

• This is suitable for run-out measurement and cylindricity measurement.

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5) Sample measurement

• A measurement where the number of samples is set to “2~999” is called a “sample measurement”.

• In practice this will take place as a single-run measurement or a continuous-run measurement. From the measured data the calculation items (mean, maximum value, minimum value, and range) that have been set for the sample measurement will be calculated and the resulting data will be automatically subject to GO/NG judgment. In addition, the measured data will be outputted for the RS-232C interface, Digimatic Output Unit interface, and printer.

• The measured data are available for statistical processing.

• This is suitable for run-out measurement and cylindricity measurement.

6) Statistical processing

• Measured data from single-run and continuous-run measurements can be statistically processed (i.e. the number of measurement times, standard deviation, maximum value, minimum value, mean, and range are calculated). These statistical processing results can be outputted for the display, printer (statistical memory for all programs will be cleared after printout), and RS-232C interface.

• Press the

STAT/S.E

key (or input “ST” command via the RS-232C interface) to start statistical processing, and press it again (or input the “NST” command via the RS-232C interface) to terminate statistical processing.

• Press the

A.CL/M.CL

(case of a simultaneous measurement), and press the

key to clear the statistical memory of the foreground program

SHIFT

and

A.CL/M.CL

keys to

clear the statistical memory of all the programs.

• These statistical results data will be stored in memory while the power is on, and will be lost when the power is turned off.

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No. 99MBC032A

3. DISPLAYS AND KEY OPERATIONS

3.2 Techniques and Terminology of Setup Functions

3.2.1 Program

• A measurement will automatically be performed according to the registered (programmed) contents including the segment (feature to be measured) and GO/NG judgment criteria, etc., in advance. Registration is performed in the function setup mode.

• This unit can hold a maximum of 10 programs, which may include various settings suitable for up to ten kinds of workpieces.

• The user can select, in the basic setup, whether these ten programs are used as individual programs (referred to as “single measurement”) or as five pairs of programs (referred to as “simultaneous measurement”).

a) Single measurement

One session of measurement is performed according to the one specified program. This is the factory default.

b) Simultaneous measurement

• In one measurement session two programs are executed at one time as a pair. These pairs are formed as shown in the figure below.

• To run a pair of programs, either of the two can be specified via numeric keys to called “background” program.

and the one specified is called “foreground” program, and its counterpart is

3.2.2 Basic setup

Pair 4: Program No.4

Program No.9

Program No.8

Pair 2: Program No.2

Pair 1: Program No.1

Pair 0: Program No.0

Program No.6

Program No.5

Pair 3: Program No.3

Program No.7

• This is used to customize the basic setup conditions, including the resolution, available functions, and interface conditions, according to the measurement requirements.

• This basic setup must be performed at the beginning of a measurement. Note that changing the setup of resolution, or simultaneous measurement in this basic setup cancel the existing calibration values and function setup.

• The basic setup mode is entered by turning on the power while holding down the

SET

key. Note that no response will be made to RS-232C in the basic setup mode.

• For more information, refer to Section 4.1, “Basic Setup”.

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3.2.3 Function setup

• Use this procedure to set up the conditions necessary for measurement. For each program number register measurement conditions including the segment (part feature to be measured), measurement interval (measurement time), and GO/NG judgment criteria that are the best suited for the objective workpiece.

• To enter the function setup mode press the

LIMIT,SHIFT+MASTER/OFFSET

, and

REF

SET

keys allows the individual setup item to be established, and the key enters the setup operation for items which are most frequently accessed for set up.

• For more information refer to Section 4.5, “Setting Up the Functions”.

3.2.4 Setups according to the property of each workpiece

For measuring workpieces that transmit light or have a dimension smaller than the diameter of the scanning beam it is critical to make setups that take into account the properties of the workpiece.

3.2.4.1 Transparent object (Workpiece that transmits light)

a) Round bar

• Workpieces such as fiber optics and glass tubes are more or less transparent, while

workpieces made of steel are not. This requires different segment settings. The segment settings for an opaque object and a transparent object are as follows:

• Setup for measurement of transparent or opaque object is possible in the basic setup.

key in the ready state. Each of the

Laser scan direction

Transparent

Workpiece

Photo-electric signal

For opaque object

Binary voltage (SHL)

Segment 1Segment 1

Segment 2

Segment 3 Segment 2

Segment 4

Segment 5 Segment 3

For transparent object

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No. 99MBC032A

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