Rockwell Automation 1746-QS,D17466.19 SYNCHRONIZED AXES MODULE - Manual (Page 19)

4–3
Publication 1746-6.19 March 1998
1. Turn off the power to the module.
2. Disconnect the axis drive output to the amplifier.
3. Turn the power back on.
4. Turn on the hydraulics.
5. Move the axis to the first position with the diddle box.
It doesn’t matter whether the first position is an extend or retract.
6. In the Scale/Offset Calibration window (from Tools in command bar):
a) Enter the desired position value into the Actual Position field for
the First Position. (For example, –4000)
b) In corresponding First Position Counts field, click “Use Current”.
7. Move the axis from the first position to the second.
8. In the Scale/Offset Calibration window (from Tools in CommandBar):
a) Enter the desired position value in the Actual Position field for the
Second Position . (For example, 40,000)
b) In corresponding Second Position Counts field, click “Use Current”.
The New Parameters area of the window will show the calculated values
for the Config word, Scale, and offset. (Set extend/retract limits later.)
9. Confirm that the displayed New Parameters (step 8) are valid. Then,
a) Click “Apply” to enter the values into configuration parameter words.
b) Click “Done” to close the editor window.
Important: You must set the EXTEND and RETRACT LIMITS after
setting the scale and offset. The Scale/Offset Calibration tool will
re-calculate any existing
EXTEND and RETRACT LIMITS automatically
when you use it to set a scale and offset.
10.For each axis, enter the desired end-point values for the EXTEND
and RETRACT LIMITS in the screen’s PARAMETER section.
Enter them in the same engineering units as used in steps 6 and 8.
11. Transfer the parameters to the module using the “P” Command.
12.Repeat this procedure for each axis in use.
Alternate Open-loop Procedure to Set Scale and Offset
You will move the axis with the module in open-loop mode to two
known machine positions (typically the extend and retract limits).
There you will use the Hydraulic Configurator “Scale/Offset
Calibration” feature to enter
ACTUAL POSITION and COUNTS values.
ATTENTION:
A. Drive outputs will be connected to the amplifier.
B. Open-loop operation will ignore all limits.
Be prepared to instantly remove drive power.
C. To avoid surprises, read the entire procedure before starting.
1. Turn off the power to the module.
2. Connect the axis drive output to the amplifier.