Rockwell Automation 8520-ARM2 9/Series CNC AMP Reference Manual Documentation Set - Manual (Page 584)

Probing Parameters
Chapter 31
31-6
Function
This parameter is used by both the G38 and G38.1 probing cycles.
The value entered for this parameter defines a tolerance band on either side
of the coordinate of the expected firing point (as entered in the probing
cycle block) for the probe. Enter a value for this parameter “D” that
defines a tolerance distance on either side of the expected firing point of
the probe. This value is added to and subtracted from the expected firing
point of the probe making the band width twice this value. This parameter
is an unsigned value.
If the probe does not fire within the tolerance band defined by this
parameter, a PROBE ERROR occurs.
This parameter may also be entered directly in the probing cycle block of
the part program with a “D” word. If the “D” word is present in the
probing cycle block, the value entered here is ignored.
Axis Parameter Number
Single Process Process 1 Process 2
All [604] [20604] [21604]
Range
0.00000 to 99999.00000 mm
or
0.00000 to 3936.96850 in.
Notes
This is a per process parameter. The value set here applies to all axes
assigned to that process.
This parameter may also be changed on the control by using the fixed
cycle parameter table.
This parameter is for mill and surface grinder applications only.
31.6
Tolerance Band Distance (D)