Rockwell Automation 8520 9/Series CNC Integration Maintenance Manual Documentation Set - Manual (Page 701)

Integrating a Split Axis with Deskew
Section 14B
14B-7
Important: If you are doing this procedure on an absolute encoder and
that encoder is attached to an axis that has been homed on this machine at
any time in the past, DO NOT come out of E-Stop until you have
completed the procedure discussed in section E.4.
13. Jog the split axis to the approximate area at which you want it to
home. It should be within the adjustment range of your home limit
switch. Check the axis monitor screen to see if “marker found” is
displayed for either the master or slave servo. If it is, turn the control
off and then back on again.
14. Slowly jog the split axis again, while watching the lower right hand
corner of the axis monitor screen, until “marker found” is displayed
for either the master or slave servo. Stop jogging immediately.
Verify that you are still within range of the home limit switch. If not,
jog the axis back to where it was, turn power to the control off and
then back on again, and repeat this step jogging in the opposite
direction.
At this point the encoders for both servos of your split axis are in a good
position for homing. Verify that the axis position is a satisfactory home
position and that the home limit switch can be mounted so that it just turns
off at the current axis position.
Also review the Home Parameters chapter in the AMP reference manual to
confirm your home parameter setup. Of special importance at this time are
the “direction to home” and “direction to move off limit switch”
parameters. Verify that they are compatible with your current axis
configuration.
ATTENTION: The steps and figures in this section explain
how to avoid conditions that can create excessive axis skew.
Failure to follow this procedure this could result in serious
damage to the machine and may cause personal injury.
Figure 14B.4 illustrates the encoder alignment situation we have created
and how we want to position it relative to the home limit switch.