Rockwell Automation 8520-MUM 9/Series CNC Mill Operation and Programming Manual Documentation Set - Manual (Page 380)

Axis Motion
Chapter 14
14-4
Figure 14.2
Results of Linear Interpolation (G01) Example
Tool follows this path
at a feedrate of 200
end point
start point
X
Y
80 20
20
60
Once the feedrate, F, is programmed it remains effective until another
feedrate is programmed (F is modal). It is possible to override programmed
F--words. For information on overriding feedrates, see chapter 18.
Example 14.3
Modal Feedrates
Program Block Comment
G91G01X10.Y20.F200; F200 is effective until
another feedrate is
programmed
Y35.;
X40.Y35.;
Y44.F50; F50 is effective
M30;
The feedrate for a multi-axis move is specified as the vectorial feedrate.
The control will adjust the individual axis feeds to obtain the programmed
feedrate. For information on feedrates, see chapter 18.