Rockwell Automation 8520-GUM 9/Series CNC Grinder Operation and Programming Manual Documentation Set - Manual (Page 639)

Chapter
19
19-1
Skip and Gauge Probing Cycles
External skip functions are motion-generating G-code blocks that can be
aborted when the control receives an external signal through the PAL
program. Gauging functions are similar to the external skip functions
except that you can use the axis coordinates (at the time the external signal
is received) to modify the wheel offset table. The major topics covered in
this chapter include:
Topic: On Page:
External Skip Functions (G31 Codes) 19-2
Wheel Gauging External Skip Functions (G37 Codes) 19-3
Important: You can also enable the G04 dwell feature as an external skip
or wheel gauging command. For details on programming a G04, see
chapter 12.
The control provides several means of triggering an external skip or
gauging block:
discrete inputs through the I/O ring
any one of the four available “High Speed Inputs”
a “Probe” input that directly latches the feedback counters
You can use these different inputs, each with different degrees of precision,
to signal the control to store the current axes positions. See documentation
prepared by your system installer for details on your specific machine.
These conditions must be satisfied when you execute an external skip or
gauging block:
you must disable dresser/wheel radius compensation (G40 mode) when
the control executes the block
the block that contains the external skip G code (excluding G04 as
external skip) must be a linear block
19.0
Chapter Overview