Rockwell Automation 8520-ARM2 9/Series CNC AMP Reference Manual Documentation Set - Manual (Page 507)

Cutter Comp/Tool Tip Radius
Chapter 23
23-7
Notes
Consider the following example:
As the tool approaches an inside arc with compensation active at a feedrate
of 200 mmpm, the control determines that the feedrate must be reduced to
120 mmpm to maintain a constant cutting feedrate. If this parameter is set
to 50%, the 120 mmpm would be allowed.
If this parameter is set to 80%, the 200 mmpm feedrate of this example
could not be reduced below 160 mmpm. The 120 mmpm feedrate would
not be allowed, and the feedrate would instead be reduced to 160 mmpm
until the arc cut was completed.
The minimum feedrate can be affected by the feedrate override switch
setting. If the feedrate override is set to 80%, the feedrate of the above
example would be 180 mmpm. If the Minimum Feed Reduction
parameter is set to 80%, the control could reduce the feedrate to 80% of
180 mmpm or 144 mmpm.