ACU-RITE DRO 200E User Manual
Readout Parameter Access Code
An access code must be entered before machine-related parameters can be set or
changed. This prevents inadvertent adjustments to the installation related
(machine) setup parameters.
The access code is 8891
IMPORTANT
Supervisors may wish to remove this page from the Reference manual after
initially setting up the readout system. Retain in a safe place for future
use.
IMPORTANT
Refer to the Setup section. Begin by pressing the
S
key. When "Setup" is dis-
played, press the 8, 8, 9, 1, and
E
keys. The readout is now ready
for machine parameter setting operations.
Hassle-Free Warranty
AACCUU-RRIITTEE
readouts and precision glass scales are warranted to the end user
against defects in material and workmanship and against any damage that
occurs to the product within three (3) years from the original purchase date.
AACCUU-RRIITTEE
will, at its discretion and expense, repair or replace the returned item
or any of the item's component(s) as long as
AACCUU-RRIITTEE
receives notice of the
defect or damage within the three (3) year warranty period.
The foregoing warranty obligations are in lieu of all expressed and/or
implied warranties of fitness or merchantability or otherwise, and state
AACCUU-
RRIITTEE
's entire liability and the end user's exclusive remedy, under any circum-
stance, for any claim of damage.
In no event shall
AACCUU-RRIITTEE
be liable for incidental or consequential dam-
ages nor shall
AACCUU-RRIITTEE
's liability for any claims or damage arising out of or
connected with this warranty or the manufacture, sale, delivery, or use of the
products with which this warranty is concerned exceed the purchase price of
said products.
TABLE OF CONTENTS
DRO 200E
A Tour of the Readout..........................................................................................................................1
Front and Back Views ....................................................................................................................1
Keypad............................................................................................................................................2
Displays...........................................................................................................................................3
Power-On Position Recovery...............................................................................................................4
Position-Trac™...............................................................................................................................4
Machine Conventions......................................................................................................................4
Introduction ..................................................................................................................1
Readout Operations ..............................................................................................................5
DRO View.............................................................................................................................................5
Absolute Display..............................................................................................................................5
Incremental Display.........................................................................................................................5
Automatic Display Switching..........................................................................................................5
Zeroing the Displays............................................................................................................................6
Absolute Zero (Datum)....................................................................................................................6
Setting Absolute Zero (Datum)at the Current Position..................................................................6
Setting Absolute Zero (Datum) Using an Electronic Edge Finder...................................................6
Setting Absolute Zero (Datum) Witha Tool......................................................................................7
Setting Absolute Zero (Datum) Using Center Line..........................................................................7
Incremental Zero.........................................................................................................................8
Presetting..............................................................................................................................................8
Absolute and Incremental Presets................................................................................................9
Center-line Presets........................................................................................................................10
EDM View...........................................................................................................................................11
EDM Display..................................................................................................................................11
Presetting the Cut Depth............................................................................................................11
Setting Absolute Zero (Datum) at Current Position......................................................................12
Setting Absolute Zero (Datum) Using a Preset............................................................................12
Zeroing the Z-axis Using the Spark Detector.............................................................................13
EDM Parameters.................................................................................................................................13
Enable..................................................................................................................................13
R Dist.........................................................................................................................................14
Z Top..........................................................................................................................................14
R Fault.......................................................................................................................................15
Dwell..............................................................................................................................................16
Timed Dwell...................................................................................................................................16
Dwell Until Sparkout......................................................................................................................16
Job Related Setup Parameters........................................................................................................17
Display Resolution........................................................................................................................17
Scale Factor..................................................................................................................................17
Near Zero Warning.......................................................................................................................18
Linear Error Compensation...........................................................................................................19
Machine Related Setup Parameters.................................................................................................21
Count Direction.............................................................................................................................21
Scale Resolution.......................................................................................................................21
Automatic Resolution Detection......................................................................................21
Entering a Scale Resolution Manually....................................................................................22
Setup.....................................................................................................................................17
This symbol alerts you to the fact that
important information concerning the
installation and operation of this readout
has been included in this manual.
Keep these instructions in a secure place
for future reference.
Troubleshooting.....................................................................................................................31
Readout Specifications..........................................................................................................30
Installation...............................................................................................................................24
TABLE OF CONTENTS
DRO 200E
Sleep.........................................................................................................................................23
Language..........................................................................................................................................23
Selecting a Location........................................................................................................................24
Proper Mounting..............................................................................................................................24
Connecting the Scales.....................................................................................................................24
Connecting a Ground Wire..............................................................................................................24
Checking Voltage and Connecting Power.......................................................................................25
Connecting the Output Relays.........................................................................................................26
Relay Connections...........................................................................................................................26
Relay Timing Diagrams........................................................................................................................27
No Operation...................................................................................................................................31
Incorrect Operation..........................................................................................................................32
Diagnostics............................................................................................................................................32
Start Up Diagnostics........................................................................................................................32
Operator-Performed Diagnostics.....................................................................................................32
Resetting Factory Defaults..............................................................................................................34
Other Error Messages.....................................................................................................................34
Data Logging....................................................................................................................................35
INTRODUCTION
DRO 200E
1
Introduction
ACU-RITE readouts provide application-specific features allowing you to obtain the
most productivity from your manual machine tools. This readout is designed specifically for EDM applications. Specific features include a special EDM display, retract relays,
and dwell capabilities.
A Tour of the Readout
Front and Back Views
EDM MM INCR ABS ZERO SET C/L
ACU-RITE
CLEAR
+/-
7
8
9
4
5
6
1
2
3
C
ENTER
0
.
MM
SETUP
ABS
INCR
RETRACT
DISPLAY
ENABLE
DWELL
ZERO
ZERO
Z
Y
X
ZERO
3x DRO
PN 2001009
SN 9766554
FCC COMPLIANCE
115V
EDGE
FINDER
INPUT 1INPUT 2INPUT 3
!
FREQUENCY
VOLTAGE
CURRENT
FUSE
2
1
3
4
5
6
Indicators
Axis keys
Zero keys
EDM function keys
Input for electronic edge finder
or spark detector
Electrical & fuse rating
information
Scale
inputs
Power switch &
voltage selector
Ground wire
connection
Output relay
connector
Model number and
Serial number
INTRODUCTION
DRO 200E
2
Keypad
Selects
absolute or
incremental
display
Used to
locate
centerlines
English
/metric
conversion
System
setup
parameters
Enter all numeric
values with these
Use to
begin a
preset
ZERO
ZERO
Z
Y
X
ZERO
ABS
INCR
MM
SETUP
CLEAR
+/-
7
8
9
4
5
6
1
2
3
ENTER
0
.
RETRACT
DISPLAY
ENABLE
DWELL
Switches display between
DRO and EDM views.
Program retract and dwell
functions.
C
Use Clear key to
erase digits that
you entered by
mistake, and to
take you back to
a previous para-
meter.
INTRODUCTION
DRO 200E
3
Displays
At the top of the display window is a row of indicators. These tell you the current state
of the readout.
EDM MM INCR ABS ZERO SET C/L
Appears
when
setting an
absolute zero.
Appears when
you are setting a
preset or an
absolute zero.
Tells you when the
centerline function
is active.
Appears when EDM
view is displaying
cut depth informa-
tion.
Appears when the
display is in metric,
dark when the display
is in inches.
These tell you if the
position display is
incremental or
absolute. They also
indicate the type of
preset.
In addition to the lighted indicators along the top of the display, the top axis display
will scroll longer messages to assist you with some of the procedures.
In this manual, the text representing key presses, indicators and display text are
shown in their own individual font styles so they are more easily distinguished from
each other and the rest of the manual text.
Key Presses:
EYS
INDICATORS
“DISPLAY TEXT”
ZERO
SET
C/L
EDM
MM
INCR
ABS
INTRODUCTION
DRO 200E
4
Power-On Position Recovery
Position-Trac™
Current ACU-RITE precision glass scales, including the ENC 150, contain distanceencrypted reference marks allowing you to quickly recall absolute zero (datum) after
a power interruption. When power is restored, the readout will scroll a message indicating power has been lost, and will prompt you to move each axis until a reference
mark is located. After this message, a flashing decimal point will indicate that
absolute zero has not been recalled for each axis. To recall zero, move each axis
in a positive count direction. By traversing approximately 2 inches on each axis, you
will re-establish and display current position relative to your last set zero.
If you use a scale without Position-Trac™ distance-encrypted reference marks, the
procedure for recovering your position is slightly different. You must find a specific
reference mark and then use the same mark when recalling zero. To setup your display for non-Position-Trac™ scales, refer to page 21, “Machine Related Parameters”.
To recall Zero using non-Position-Trac™ scales:
1. Move near the desired reference mark.
2. Press and hold the
A
key until the decimal point starts to flash.
3. Move slowly past the reference mark until the readout recalls its position.
You must move in the positive count direction.
Machine Conventions
For the purposes of this manual, all of the examples are based on the following
conventions.
As you face the machine:
• The tool moving right is X-axis positive
• The tool moving away from you is Y-axis
positive
• The tool moving up is Z-axis positive
+Z
+Y
–Y
–Z
+X
–X
X=0
Y=0
Z=0
READOUT OPERATIONS
DRO 200E
5
Readout Operations
DRO View
Absolute Display
Shows the distance from your current position to absolute zero (datum).
1.625
ABS Display will read: 1.6250 in X-Axis
The electrode is
positioned at 1.625
ABS.
Absolute Zero,
also called datum
or Workpiece Zero
Incremental Display
Shows the distance from your current position to incremental zero. An incremental zero is set when you preset a dimension (explained later), or when you zero the
incremental display.
1.625
-0.625
The electrode is 0.625
on the negative side of
the incremental zero.
Incremental zero: the
incremental display will
read 0.0000 when the
electrode is here.
Absolute Zero
(Datum)
INCR Display will read: -0.6250 in X-Axis
ABS Display will read: 1.0000 in X-Axis
ABS
INCR
Location of
Electrode
Pressing the ABS/INCR
key changes the display
Automatic Display Switching
Sometimes the readout will switch from absolute to incremental automatically.
For example, when you enter a preset the readout switches to the incremental
display so you can move to zero. Whenever the readout does an automatic display
switch, “INCR” will appear briefly in the X-axis display.
This section describes the readout’s functions when it is in the DRO view. This includes
a description of absolute and incremental displays, the various methods of setting
absolute zero (datum) and presetting absolute and incremental distances.
READOUT OPERATIONS
DRO 200E
6
On many prints, dimensions are measured
from a datum. By setting the readout’s
absolute display to zero at a well-chosen
edge, you can position the ram based on
dimensions directly from the print.
Setting Absolute Zero (Datum) at the
Current Position
1. Move to desired location.
2. Make sure that the absolute indicator (ABS) is lit.
Press the
A
key if it is not.
3. Press the
z
key next to the desired axis twice.
Zeroing the Displays
Absolute Zero (Datum)
0.72
1.44
2.44
Absolute Zero
(Datum)
1.25
1. Install the electronic edge finder into the ram and
connect it to the readout.
2. Make sure that the absolute indicator (ABS) is lit.
Press the
A
key if it is not.
3. Press the
z
key for the appropriate axis once.
The readout will display the following; “_ _ _ _ _ _ _ 0”.
4. Move slowly until the edge finder touches
the edge of the workpiece. The absolute
position display will automatically be set to
zero at the edge of the workpiece. Refer to
setup to automatically compensate for the
edge finder’s tip diameter.
Note: You don't have to worry about
overtraveling. The readout
will zero on contact.
Automatic
Radius
Compensation
Setting Absolute Zero (Datum) Using an Electronic Edge Finder
Note: If you are using an electronic edge
finder with your readout, a metallic
surface must be present in order
for the edgefinder to work properly.
READOUT OPERATIONS
DRO 200E
7
Setting Absolute Zero (Datum) with a Tool
1. Touch the tool to the edge of the workpiece.
2. Make sure that the absolute indicator (ABS) is lit.
Press the
A
key if it is not.
3. Press the
z
key for the appropriate axis.
The readout will display these indicators: ABS ZERO SET
4. Enter the position of the tool center and press
E
.
.25 Inch
Tool
-.125
Setting Absolute Zero (Datum) Using Center Line
You can set absolute zero (datum) at the center of your workpiece or in the center of
a hole. To set absolute zero using centerline:
1. Verify the readout is in ABS mode. The ABS indicator will be displayed.
If not press the
A
key to select the absolute mode.
2. Press the
z
key for the appropriate axis.
3. Press the
L
key. A message will ask you to
“ENTER FIRST EDGE”. Move to the first edge.
4. Press the
E
key.
Note: The closer you are to the
center of the feature the
more accurate your centerline calculation will be.
5. A message will ask you to “ENTER
SECOND EDGE”. Move to the second edge.
6. Press
E
key.
Absolute zero (datum) is now set at
the center between the two points.
The display will change showing
you the distance to center line on
that axis.
Repeat this procedure to set absolute zero center line in the other axis.
First
Point
First
Point
Second
Point
Second
Point
Absolute zero is now set in the center on both X and Y-axes.
READOUT OPERATIONS
DRO 200E
8
Incremental Zero
From the incremental display (INCR), press the
z
key next to the appropriate axis.
This sets the display to zero at the current tool position.
Presetting
Absolute
The absolute preset is based on datum. When an absolute preset is entered, the readout calculates the incremental distance to the preset position. In the example below,
the current position is 1.0000” and the desired position is 1.5000” as measured from
datum. The key press sequence is
X
,
A
(ABS indicator is lit),
1,.,5
,
and
E
. The readout will automatically shift to incremental display mode and show the
distance remaining to the preset position.
An absolute (ABS) preset
is based on Absolute Zero
(Datum).
Absolute
Zero
(Datum)
X
ABS
INCR
.
1 5
ENTER
1.50
Current
Position
INCR
X
ABS
INCR
ABS
.
1 5
ENTER
1.50
Absolute Preset
Incrementel Preset
An incrementel (INCR)
preset is based on current
position.
INCR Display will read: -0.5000 in X-Axis
1.00
INCR Display will read: -1.5000 in X-Axis
Incremental
The incremental preset is based on current position. When an incremental preset is
entered, the readout displays the length of preset value. In the above example, the
current position is 1.0000” and the desired position is 1.5000” from current position.
The key press sequence is
X
,
A
(INCR indicator is lit)
,
1,.,5,E
. The
readout will automatically shift to incremental mode and show the distance to move.
READOUT OPERATIONS
DRO 200E
9
Absolute and Incremental Presets
To maintain the best tolerance and to minimize the chance of errors, use
• absolute presets for absolute dimensions.
• incremental presets for incremental dimensions.
The following examples, shows how to make the identical part using absolute
presetting or incremental presetting.
Absolute Example:
.72
1.44
2.44
Note: When you enter an absolute preset,
it does not matter where the tool
position is. This system calculates
the desired location from absolute zero
(datum).
1. Verify the readout is in ABS mode. If not press A.
2. Press, in order, Xkey, then type in
.,7,2
,
then
E
.
3. Repeat for dimensions 1.44 and 2.44.
0.72
0.72
1.00
Absolute
Incremental
Incremental
Note: When you enter an incremental
preset, the tool must be positioned at the location you are
dimensioning from.
Incremental Example:
1. Verify the readout is in ABS mode. If not
press A.
2. Enter the key sequence:
X,.,7,2,E
.
3. Display will automatically shift to incremental. Move the X-axis until “0.0000” is
displayed.
4. Enter the key sequence:
X
,
A
, to select incremental (
IINNCCRR
)
.,7,2,E
.
5. Move the X-axis until “0.0000” is displayed.
6. Repeat steps 4 & 5 for incremental dimension 1.00.
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