Rockwell Automation 8520-MUM 9/Series CNC Mill Operation and Programming Manual Documentation Set - Manual (Page 454)

Programming Feedrates
Chapter 18
18-6
Figure 18.5
Feed Per Revolution Mode (G95)
Amount of cutting tool motion
per spindle revolution
Cutting tool position after
one spindle revolution
F
When changing from G93 or G94 modes to G95 mode, an F--word must be
programmed in the initial G95 block.
Since the G95 code is modal, it remains active until canceled by the G94
mode. It is also temporarily cancelled during execution of a G93 block.
Any F--word programmed while G95 mode is active will be considered a
feed per minute feedrate.
Certain axis motions request from the control a rapid feedrate. For
example, the G00 and some of the fixed cycles call for the rapid feedrate.
The system installer specifies the rapid feedrate individually for each axis
in AMP. When executing using a rapid feedrate the control drives the axes
to maintain the fastest possible linear move while still remaining under (or
at) each axis rapid feedrate.
When positioning mode is active, any programmed F--word executed by
the control is stored as the currently active cutting feedrate. The rapid
feedrate will not be affected.
18.1.5
Rapid Feedrate