Rockwell Automation 8520-ARM2 9/Series CNC AMP Reference Manual Documentation Set - Manual (Page 582)

Probing Parameters
Chapter 31
31-4
Notes
This is a global parameter. The value set here applies to all axes
and processes. All processes must use the same probe transition type.
This and the following sections discuss the parameters that are used with
the G38 hole probing and G38.1 part rotation probing cycles. These
parameters correspond directly to a G38 or G38.1 block parameter entered
in the part program. For example, the value for the probe approach
distance can be entered as under the Approach Distance “R” parameter
here, or it can be entered as an ”R” value in the G38 block. A value
entered in the part program block will override the value entered in AMP
Typically the G38 hole probing cycle is used to measure the diameter of a
hole in a part by using a touch probe. The G38.1 part rotation probing
cycle is used to measure (with a touch probe) the amount that a part is out
of parallel with a selected axis. These cycles are discussed in detail in your
programming and operation manual. Their operation is also very
PAL-dependant. Refer to documentation prepared by the system installer
for more information.
Important: There are also two skip functions (G31s and G37s) that may
use a probe for tool measurement or other functions. The AMP parameters
for these cycles are discussed in chapter 21 of this manual.
These parameters are for mill and surface grinder applications only.
31.4
G38, G38.1 Probing Cycle
Parameters