Rockwell Automation 8520-GUM 9/Series CNC Grinder Operation and Programming Manual Documentation Set - Manual (Page 428)

Axis Motion
Chapter 12
12-56
In the G94 mode (feed per minute), the numeric value following address F
represents the distance the axis or axes move (in inches or millimeters) per
minute. If the axis is a rotary axis, the F--word value represents the
number of degrees the axis rotates per minute.
To program a feedrate of 55 mm of axis motion per minute program:
G94 F55.;
Figure 12.28
Feed Per Minute Mode (G94)
F
Grinding
wheel
Workpiece
Grinding
wheel
12039-I
“F” is the distance the
wheel moves per minute
When changing from G95 to G94 modes, a feedrate must be programmed
in the first G94 block.
Since the G94 code is modal, any F--word programmed in any block after
the G94 is considered a feed distance per minute until a G95 is executed.
In the G95 mode (feed per revolution), the numeric value following
address F represents the distance the axis or axes move (in inches or
millimeters) per revolution of the spindle. If the axis is a rotary axis, the
F--word value represents the number of degrees the axis rotates per
revolution of the spindle.
To program a feedrate of 1.5 mm per revolution of workpiece program:
G95 F1.5;
When changing from G94 to G95 modes, a feedrate must be programmed
in the first G95 block.
Since the G95 code is modal, any F--word programmed in any block after
the G95 is considered a feed distance per spindle revolution until a G94 is
executed.
12.7.2
Feed Per Minute Mode (G94)
12.7.3
Feed Per Revolution Mode
(G95)