Rockwell Automation 8520-GUM 9/Series CNC Grinder Operation and Programming Manual Documentation Set - Manual (Page 642)

Skip and Gauge probing Cycles
Chapter 19
19-4
The format for any G37 skip block is:
G37 Z__ F__;
Where : Is :
G37 any of the G codes in the G37 series. Use the one that is configured to respond
to the current skip signal device that is being used.
X, Z the axis on which the length offset measurement is to be taken, specified here as
either X or Z. Only one axis can be specified in a G37 block. The numeric value
following the axis name corresponds to the exact coordinate at which the skip
signal is expected to occur. This value is a signed value (+ or --) and determines
the initial direction of travel.
F the wheel gauging external skip function feedrate. If no value is entered here,
the external skip function executes 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.
Important: You cannot use the G37 series G codes to modify the wheel
radius offset values. You can only modify wheel length offset values.
The target offset value for these gauging functions is determined by the
currently active wheel offset number.
ATTENTION: If modifying a wheel length offset, the offset
value generated with this gauging function is immediately
loaded into the offset table. Since this offset must be the
currently active offset, it becomes effective immediately when
the next block is executed or is delayed until the next block that
contains motion on the wheel length axis is executed (when an
offset is activated is determined in AMP by your system
installer).
The G37 series of G codes always produces linear motion regardless of the
current mode active at their execution. After their completion, the control
returns to the operating mode active before the skip block was read (G00,
G01, G02, G03).
Your system installer determines in AMP a position tolerance for the G37
functions. This tolerance defines a legal range before and after the
coordinate position programmed with the axis word in the G37 block.
If the skip signal is received before the wheel enters or after the wheel
exits the position tolerance range, a PROBE ERROR occurs. This error
appears on the screen as a warning but does not place the control in
E-STOP. Instead, the control aborts the G37 block and proceeds program
execution to the next block. No modification of the wheel offset table is
performed.