Rockwell Automation 8520 9/Series CNC Lathe - Manual (Page 324)

Coordinate System Offsets
Chapter 11
11-18
A G52 offset can also be canceled by executing a G92 or G92.1,
performing a control reset or an E-STOP reset operation, or executing an
end of program M30 or M02. A G92 command only cancels a G52 offset
if one is active when the G92 block is executed. A G52 offset can be
activated at some time after the G92 block is executed even if a G92 offset
is still in effect.
CAUTION: G52 offsets are global. Changing from one
coordinate system to another does not cancel the offset. Do not
specify a change in coordinate systems (G54-G59) unless the
effects of the offset have been considered.
When you perform a Set Zero operation, the control shifts the current work
coordinate system so that the current tools position is the zero point of the
coordinate system. The axis where you want to perform a set zero on is
selected through PAL (refer to your system installer’s documentation) or
by the current jog axis if using the {FRONT PANEL} option.
The Set Zero offset is similar to the execution of a G92 X0 Z0 block, with
one exception. Unlike a G92, the set zero does not cancel a G52 offset.
The G52 remains active and continues to offset the current tool position in
the work coordinate system. When the G52 offset is canceled later, the
coordinate system shifts.
The Set Zero offset can be canceled by programming a G92.1 command,
executing a control reset operation, executing an E-STOP reset operation,
or programming an end of program M30 or M02 command. A control reset
may cancel the Set Zero offset, depending upon the selections made in
AMP by your system installer.
CAUTION: Set Zero offsets are global. Changing from one
coordinate system to another does not cancel the offset. Do not
specify a change in coordinate systems (G54-G59) unless the
effects of the offset have been considered.
11.4.3
{SET ZERO} Offset