FANUC Series 16/18/160/180-Model C Machining Center Operators Manual

PROGRAMMING
5. FEED FUNCTIONS
B–62764EN/01
84
Feedrate of linear interpolation (G01), circular interpolation (G02, G03),
etc. are commanded with numbers after the F code.
In cutting feed, the next block is executed so that the feedrate change from
the previous block is minimized.
Four modes of specification are available:
1. Feed per minute (G94)
After F, specify the amount of feed of the tool per minute.
2. Feed per revolution (G95)
After F, specify the amount of feed of the tool per spindle revolution.
3. Inverse time feed (G93)
Specify the inverse time (FRN) after F.
4. F1–digit feed
Specify a desired one–digit number after F. Then, the feedrate set with
the CNC for that number is set.
Feed per minute
G94 ; G code (group 05) for feed per minute
F_ ; Feedrate command (mm/min or inch/min)
Feed per revolution
G95 ; G code (group 05) for feed per revolution
F_ ; Feedrate command (mm/rev or inch/rev)
F1–digit feed
FN ;
N : Number from 1 to 9
Inverse time feed (G93)
G93 ; Inverse time feed command
G code (05 group)
F_ ; Feedrate command (1/min)
Cutting feed is controlled so that the tangential feedrate is always set at
a specified feedrate.
X
End point
Starting
point
X
F
F
Center
End point
Start
point
Linear interpolation
Circular interpolation
YY
Fig. 5.3 (a) Tangential feedrate (F)
5.3
CUTTING FEED
Format
Explanations
D Tangential speed
constant control

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