Rockwell Automation 8520-MUM 9/Series CNC Mill Operation and Programming Manual Documentation Set - Manual (Page 677)

Skip, Gauge, and Probing Cycles
Chapter 27
27-3
Format for any G31 external skip blocks is as follows:
G31 X__ Y__ Z__ F__;
Where : Is :
G31 Any of the G codes in the G31 series or G04. Use the one that is configured to
respond to the current external skip signal device that is being used.
X, Y, Z The endpoint of the move if no external skip signal is received. These also
determine the direction that the tool will travel in.
F The external skip function feedrate. If no value is entered here, the external skip
function will execute at either the currently active feedrate, or the feedrate
defined for it in AMP (based on whether the AMP parameter Use AMP Skip
Feedrate is set to ”NO”or ”YES”). A value entered here replaces the currently
active feedrate and supersedes the AMP defined feedrate.
The G31 series of G codes always produce linear motion regardless of the
current mode active at their execution. After their completion the control
returns to the operating mode active before the external skip block was
read (G00, G01, G02, G03).
Important: The move that immediately follows a G31 series external skip
block cannot be a circular move.
The coordinates of the axes when the external skip signal is received are
available as the paramacro system parameters #5061-#5066 (work
coordinate system) and #5071-#5076 (machine coordinate system). These
values will have been adjusted to compensate for the probe tip radius if a
radius compensation value was entered.
For example, assume you have entered a probe tip radius of .01. It is
triggered as axis 2 approaches in the positive direction at the axis 2
coordinate of 1.1200. The value available for paramacro parameter #5072
would be 1.1300
Probe tip radius is defined by the system installer in AMP. This value may
also be changed through the paramacro system parameter #5096, or
through the probe parameter table described in section 27.5.