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

PROGRAMMING
5. FEED FUNCTIONS
B–62764EN/01
92
WARNING
When the block before a corner is a start–up block, or the
block after a corner includes G41 or G42, the feedrate is not
overridden. The feedrate override function is disabled when
the offset value is 0.
When a corner is determined to be an inner corner, the feedrate is
overridden before and after the inner corner. The distances Ls and Le,
where the feedrate is overridden, are distances from points on the cutter
center path to the corner (Fig. 5.4.2 (b), Fig. 5.4.2 (c), Fig. 5.4.2 (d)). Ls
and Le are set with parameter Nos. 1713 and 1714.
Programmed path
Le
a
b
Ls
Cutter center path
The feedrate is overridden from point a to point b.
FIg. 5.4.2 (b) Override Range (Straight Line to Straight Line)
When a programmed path consists of two arcs, the feedrate is overridden
if the start and end points are in the same quadrant or in adjacent quadrants
(Fig. 5.4.2 (c)).
a
Le
Ls
b
Programmed path
The feedrate is overridden from point a to b.
Cutter center path
Fig. 5.4.2 (c) Override Range (Arc to Arc)
Override range

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