Rockwell Automation 8520-MUM 9/Series CNC Mill Operation and Programming Manual Documentation Set - Manual (Page 481)

Dual Axis Operation
Chapter 19
19-7
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 discusses the difference in operation of a dual axis when it
concerns offsets. How to activate/deactivate and enter these offset values
is not discussed here unless some change specific to a dual axis occurs.
Refer to the section in chapter 4 of this manual discussing 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 desire 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
whether they are parked or not. 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 if 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.
Different G92 offset values may be created for each axis if necessary. 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.
19.1.4
Offset Management for a
Dual Axis