Rockwell Automation 8520-GUM 9/Series CNC Grinder Operation and Programming Manual Documentation Set - Manual (Page 430)

Axis Motion
Chapter 12
12-58
<FEEDRATE OVERRIDE> Switch
The <FEEDRATE OVERRIDE> switch on the MTB panel can override:
the feedrate programmed with an F--word in any of the feedrate modes
(G93/94/95)
the reciprocation feedrate programmed with an E--word during any of
the surface or cylindrical grinding fixed cycles (G82 - G88.1)
The <FEEDRATE OVERRIDE> switch has a range of 0%-150% of the
programmed feedrate, and alters the programmed feedrate in 10%
increments. When set to 0%, the control is effectively in feedhold.
The control checks whether the feedrate resulting from the
<FEEDRATE OVERRIDE> switch setting exceeds the maximum feedrate
set in AMP. If it does, the feedrate is restricted to the AMP maximum.
An M49 (overrides disabled) causes the override amounts that are set by
the switches on the MTB panel to be ignored by the control. With M49
active, the override switches for feedrate, rapid feedrate, and spindle speed
are all set to 100%. They can be enabled by programming an M48
(overrides enabled). See chapter 10 for details.
Important: Ultimately, all switches on the MTB panel are controlled by
PAL. Refer to the documentation prepared by your system installer.
<RAPID FEEDRATE OVERRIDE> Switch
The <RAPID FEEDRATE OVERRIDE> switch on the MTB panel can
override the rapid feedrate for G00 mode in four increments:
F1 -- % value set in AMP by your system installer
25%
50%
100%
Important: Normally this override switch is not active for any dry run
motions (see chapter 7) unless otherwise specified in PAL by your system
installer.
Important: This override is also effective for jog moves that use the rapid
feedrate (see jogging using the <TRVRS> button in chapter 4).
Important: Ultimately, all switches on the MTB panel are controlled by
PAL. See the documentation prepared by your system installer.
12.7.5
Feedrate Overrides