Rockwell Automation 8520 9/Series CNC Lathe - Manual (Page 303)

Introduction to Programming
Chapter 10
10-35
Important: Your system installer sets a maximum speed in AMP for each
gear range for each spindle configured in AMP. If an S-word is
programmed requesting a spindle speed that exceeds this limit. The
spindle speed holds at the AMP-defined maximum. A new value may be
set for this maximum RPM by programming a G92 code followed by an
S-word. See chapter 17.
When programming an S-word in a block that contains axis motion
commands, the PAL program has the option to temporarily suspend the
axis motion commands until the spindle reaches speed. The control has the
ability to take the programmed spindle speed and automatically search for
the gear range that is AMPed to allow the necessary RPM. The operation
of gear changing and how it is implemented is very PAL dependant. Refer
to your system installers documentation for details on how a gear change
operation is performed.
For details on programming spindle speeds, see chapter 17.
Important: When you activate, the MISCELLANEOUS FUNCTION
LOCK feature, the control displays M-, B-, S-, and T-words in the part
program and activates the corresponding Tool Wear Offset, with the
exception of M00, M01, M02, M30, M98, and M99. This feature is
activated as described on section 7.1.2.
Override spindle speeds designated in a program with the
<SPINDLE SPEED OVERRIDE> switch on the MTB panel. This switch
can be positioned in five percent increments within a range of 50 - 120
percent. For details, refer to your system installers instruction manual.
Use the override cancel M-code (M49) to ignore any override set on the
MTB panel. When the override setting is ignored, the axis feedrate, rapid
feedrate, and the spindle speed values are all set to 100 percent. For more
information on spindle functions, see chapter 17.