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

PROGRAMMING
15. COMPENSATION FUNCTION
B–62764EN/01
302
Normally there is almost no possibility of generating this situation.
However, when G41 and G42 are changed, or when a G40 was
commanded with address I, J, and K this situation can occur.
In this case of the figure, the cutter compensation is not performed with
more than one circle circumference: an arc is formed from P
1
to P
2
as
shown. Depending on the circumstances, an alarm may be displayed due
to the ”Interference Check” described later. To execute a circle with more
than one circumference, the circle must be specified in segments.
N5
N6
N7
P
1
P
2
(G42)
N5 G01 G91 X500.0 Y–700.0 ;
N6 G41 G02 J–500.0 ;
N7 G42 G01 X500.0 Y700.0 ;
Programmed path
Tool center path
The length of tool center path
larger than the circumference
of a circle

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