Rockwell Automation 8520-MUM 9/Series CNC Mill Operation and Programming Manual Documentation Set - Manual (Page 798)

Chapter 30
Using a 9/Series Dual--processing System
30-30
You can not change the offset for an axis that is not currently assigned to
the process through a part program (G52, and G92). You can however
change coordinate system tables without the shared axis being in the
process using PAL or by manually inputting the data through the
{OFFSET} softkey. If the shared axis is not in the process activating the
new work coordinate system (G54-G59.3) the data for the shared axis is
not activated until that axis is moved under the control of that process.
Shared Axis Tool Offsets
Tool offset data for shared axes are shared from process to process. There
are no separate tool offset table entries between processes. If you alter the
tool offset value for a shared axis tool number in process one, the same
geometry offset value for the shared axis in process two is used. This
feature allows you to activate a tool offset for a shared axis and have that
offset carried on to additional processes as that axis changes processes.
Important: You can only change the tool offset tables for axes in your
current process. If your shared axis is not in the current process it is not
available on the offset table screen for editing. G10 commands also only
modify shared axis offset values when the shared axis is assigned to the
process executing the G10 command.
If you require different tool offsets for a shared axis between processes you
should use independent tool offset numbers for each process (for example
only use tools 1-50 for process one and tools 51-100 for process two).
Tool offsets are re-initialized when an axis changes processes. A shared
axis can change processes even if the tool offset for that axis has not yet
been made fully active (delay shift or delay move).
If a tool is activated with an offset for a shared axis not currently in the
process, the motion and position shift of that offset is deferred until the
shared axis is moved into the process. This is independent of the AMP
selected tool offset activation type (delay or immediate shift/move).
Example 30.8
Changing Processes with Tool Offsets
Process One
Activates this Tool
Process Two
Activates this Tool
Shared Axis
T10 H10;
(controls shared axis) T0 H0; Process one activates tool offset on shared axis as defined in AMP
(delayed/immediate shift/move). When process two takes control of the shared axis,
the shared axis tool offset is canceled in process two.
T11 H11;
(controls shared axis) T11 H11; Has same offset for both processes. When you shift the shared axis between
processes, the offset remains active on the axis. When the shared axis changes
processes the tool offsets are re-initialized and the AMP selected activation method
(delayed/immediate shift/move) still occurs.
T11 H11; T22 H22;
(controls shared axis) Process two activates tool offset on shared axis as defined in AMP
(delayed/immediate shift/move). When you switch the shared axis to processes one,
the offset changes to the tool offset value requested in process one. Since the
offsets are re-initialized when shared axes change processes, the AMP selected
activation method (delayed/immediate shift/move) still occurs.