Rockwell Automation 8520-GUM 9/Series CNC Grinder Operation and Programming Manual Documentation Set - Manual (Page 643)

Skip and Gauge probing Cycles
Chapter 19
19-5
Important: The move that immediately follows a G37 series skip block
cannot be a circular move.
Your system installer determines in AMP if the new value is added to or
replaces the old value in the table. Your system installer also determines in
AMP which gauge functions alter which wheel geometry or radius offset
tables.
The control automatically compensates for probe radius and length when
calculating wheel offset changes if these probe parameters have been
entered.
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 have been adjusted to compensate for the probe tip radius and the
probe length if radius and length compensation values were 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.
Your system installer defines probe tip radius and probe length in AMP.
You can also change these values through the paramacro system
parameters #5096 (for radius) and #5095 (for length). See chapter 20 for
details on paramacro parameters.
Wheel Gauging Application Example
A typical application for these G codes in determining wheel length offsets
would execute as follows:
1. When the control executes the G37 block, the wheel is moved
towards the triggering device using the axis specified in the block.
2. When the control receives the appropriate skip signal through PAL,
axis motion stops.
3. The control records the position when the skip signal is received. It
determines the difference by subtracting the position specified with
the axis word in the G37 block from this position. The difference is
then added to or replaces the value in the appropriate wheel length
offset table for the currently active wheel offset number.