Rockwell Automation 8520-GUM 9/Series CNC Grinder Operation and Programming Manual Documentation Set - Manual (Page 460)

Axis Motion
Chapter 12
12-88
Consideration should be given to offsets used for a dual axis. In most
cases, each axis can have independent offset values assigned to it. This
section describes the difference in operation of a dual axis when it
concerns offsets. How to activate/deactivate and enter these offset values
is not described here unless some change specific to a dual axis occurs.
Refer to the section in chapter 3 of this manual describing the offset you
are using for implementation details.
Preset Work Coordinate Systems (G54-G59.3)
The operation of the work coordinate systems is functionally the same for
a dual axis as any other axis. Each axis in the dual group can have its own
independent value entered into the offset table. If you want all axes in the
dual group to have the same offset values, you must manually enter the
same value for each axis in the dual group.
G52 Offsets
All axes in the dual group use the same value for the G52 offset regardless
of whether they are parked. When a G52 offset value is specified using the
master axis name, each axis offsets its coordinate system incrementally by
the G52 amount.
G92 Offsets
When a G92 offset value is specified using the master axis name, the
current position of all axes in the dual group take on the location of the
specified value. For example, if you have a dual axis named X, and it
consists of two axes, X1 and X2, when programming the following:
G92X10;
the control causes the current positions of X1 and X2 to become 10
regardless of their current positions when the G92 offset is executed.
You can create different G92 offset values for each axis. This is
accomplished by performing a jog offset or by using the PAL axis mover to
change the position of the dual axes relative to each other before the G92
block is executed.
12.13.4
Offset Management for a
Dual Axis