Rockwell Automation 8520-GUM 9/Series CNC Grinder Operation and Programming Manual Documentation Set - Manual (Page 330)

Coordinate Control
Chapter 11
11-14
Use the G92 command in a part program to offset the currently active work
coordinate system relative to the current wheel position. A G92 block in a
program offsets the zero point of the work coordinate system a specified
distance from the current wheel position.
G92.2 cancels G92 without canceling any other work coordinates. This
differs from G92.1, which cancels all coordinate system offsets.
When the control executes a G92 command in a program, it cancels any
other active work coordinate system offsets including G52 offsets, jogged
offsets, and set zero offsets. The external offsets are not affected.
Important: Wheel length offsets are not automatically canceled when a
G92 block is executed. This can result in undesired effects on the work
coordinate system when wheel offsets are changed later.
The following G92 block offsets the work coordinate system so that the
current wheel position takes on the coordinate values programmed in the
G92 block.
G92 X___ Z___;
For example, specifying values of zero for all axes in a G92 block causes
the current wheel position to become the zero point of the current work
coordinate system.
Execution of a G92 block does not produce any axis motion.
Important: Any axis not specified in the G92 block is not offset, and the
current coordinate position for that axis remains unchanged.
Once the work coordinate system is offset, all absolute positioning
commands in the program are executed as coordinate values in the offset
coordinate system.
11.4.1
Coordinate Offset Using
Wheel Position (G92)