Rockwell Automation 8520 9/Series CNC Lathe - Manual (Page 455)

Dual Axis Operation
Chapter 19
19-7
Give consideration 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 dual axis operation 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. See chapter 3 for
implementation details about the offset you are using.
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 you specify a G52 offset value 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 takes 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.
Different G92 offset values can 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.
19.4
Offset Management for a
Dual Axis