Rockwell Automation 1746-QS,D17466.19 SYNCHRONIZED AXES MODULE - Manual (Page 20)

4–4
Publication 1746-6.19 March 1998
3. Turn the power back on.
4. Turn on the hydraulics.
If the axis drifts, go back to the Null Drive procedure.
If not, go to step 5.
5. To move the axis to the first position (either extend or retract).
a) Estimate drive output (mV) that would generate a slow safe speed.
Enter it into the COMMAND VALUE number field.
Note: In open-loop mode, this field sets the module output.
In closed-loop mode, this field sets the commanded position.
b) Command the module to output that value with the “O“ command.
The axis should start to move.
6. To stop axis motion:
a) Zero the COMMAND VALUE number field.
b) Command the module to zero its output with an “O” command.
7. In Scale/Offset Calibration window (from Tools in CommandBar):
a) Enter the desired position value in the Actual Position field for
the First Position . (For example, 40,000)
b) In corresponding Counts field, click “Use Current”.
8. To move the axis to the second position:
a) Command the module to output a negative value (such as –200)
with the “O” command (as with step 5b).
The axis should start to retract. If not, verify that the value is (–).
9. To stop axis motion:
a) Zero the COMMAND VALUE number field.
b) Command the module to zero its output with an “O” command.
10. In the Scale/Offset Calibration window (from Tools in command bar):
a) Enter the desired position value in the Actual Position field for the
Second Position . (For example, –4000)
b) In corresponding 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.)
11. Confirm that the displayed New Parameters (step 10) 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.
12.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 7 and 10.
13. Initialize (activate) axis parameters with the “P” Command.
14.Repeat this procedure for each axis in use.