Rockwell Automation 8520-GUM 9/Series CNC Grinder Operation and Programming Manual Documentation Set - Manual (Page 461)

Axis Motion
Chapter 12
12-89
Set Zero
You can perform a set zero operation on the axes in a dual group on an
individual basis. For example, if you have a dual axis named X and it
consists of two axes, X1 and X2, when the set zero operation is executed
through PAL, you must specify which axis in the dual group to set zero.
When the set zero operation is performed on an axis, the current axis
location becomes the new zero point of the coordinate system.
Wheel Compensation
Only one wheel diameter can be active at any one time. Any offset created
by compensation affects all axes in the dual group.
Wheel Length Offsets
Functionality is the same as for any other axis; independent values can be
entered for each axis in the dual group. A T--word selects the length offset
number, and the wheel length offset is activated for each axis. Refer to
chapter 13 for details on activating wheel length offsets.
Additional programming for the G10L10 codes is necessary when a dual
axis is the wheel length axis. Since each axis in the dual group can have
separate offset values, the G10 block must contain an individual name for
each axis being assigned a value. Just programming the master axis name
assigns values only to the master axis. Your system installer assigns names
to all axes in the dual group in AMP. Refer to the documentation prepared
by your system installer for details.
END OF CHAPTER