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

PROGRAMMING
B–62764EN/01
20. HIGH SPEED CUTTING FUNCTIONS
449
When the cutter compensation C option is provided, cutter compensation
C is enabled even in HPCC mode. Operation in the offset mode is the
same as when HPCC mode is not set, except in the following cases:
S When the end point for an arc does not lie on the arc
In the HPCC mode, when the end point for an arc does not lie on the
arc, the start point and end point are connected with a smooth curve;
no arc leading line is created. In this case, the system assumes an
imaginary circle to perform cutter compensation C. The center of the
imaginary circle is the same as the center of the arc, but the imaginary
circle passes through the end point. Under the assumption that cutter
compensation has been performed with respect to the imaginary circle,
the system creates a vector and performs compensation.
L
L
S
r
L
r
Imaginary circle
Programmed path
Arc end point
Center
S When the offset mode is canceled temporarily
In the HPCC mode, automatic reference position return (G28) and
automatic return from the reference position (G29) cannot be
specified. Therefore, commands that must cancel the offset mode
temporarily cannot be specified.
When using cutter compensation C in the HPCC mode, note the following
points:
(1)When G05 P10000 and G05 P0, and G41/G42 and G40 are to be
specified together, G41/G42 to G40 must be nested between G05
P10000 and G05 P0. This means that HPCC mode cannot be started
or canceled in cutter compensation (G41/G42) mode. If such a
specification is made, the P/S alarm No.0178 or P/S alarm No.5013
P/S alarm is issued.
D Cutter compensation C

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