Rockwell Automation 8520-MUM 9/Series CNC Mill Operation and Programming Manual Documentation Set - Manual (Page 297)

Introduction to Programming
Chapter 10
10-23
An F--word with numeric values specifies feedrates for the cutting tool in
linear interpolation (G01), and circular interpolation (G02/G03) modes.
The feedrate is the speed along a vector of the commanded axes, as shown
in the following figure.
Figure 10.5
Feedrate Vectors
X
Y
55
end point
start point
Feedrate of 220 is effective
along this motion path
75
The term “feed” refers to moving a tool at a specific velocity in a cutting
path. “Feedrate” is the velocity programmed for the feed of a tool.
Feedrates are expressed by the distance of movement per interval.
Depending on the mode of the control and the results wanted, the distance
can be millimeters, inches, meters, or revolutions. The interval can be
minutes or revolutions.
Table 10.D
Feedrate Units
Unit/Interval Abbreviation Typically Used For:
millimeters per minute mmpm linear axis feedrates
inches per minute ipm linear axis feedrates
revolutions per minute rpm rotary axis feedrates
millimeters per rev mmpr threading
inches per rev ipr threading
10.5.4
F- words (Feedrate)