Rockwell Automation 8520-ARM2 9/Series CNC AMP Reference Manual Documentation Set - Manual (Page 585)

Probing Parameters
Chapter 31
31-7
Function
This parameter is used by both the G38 and G38.1 probing cycles.
The value entered for this parameter defines a feedrate at which the probe
is to approach the location specified by the “R” parameter. This feedrate
may be relatively high to allow for a faster cycle time. After the probe
reaches the point specified by the “R” parameter, the feedrate will slow to
that rate specified by the “F” parameter.
This parameter may also be entered directly in the probing cycle block of
the part program with an “E” word. If the “E” word is present in the
probing cycle block, the value entered here is ignored.
Axis Parameter Number
Single Process Process 1 Process 2
All [605] [20605] [21605]
Range
0.00000 to 5999940.00000 mmpm
or
0.00000 to 236218.11024 ipm
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.
31.7
Approach Rate (E)