FANUC Series 16/18/160/180-Model C for Lathe Operator Manual

PROGRAMMING
B–62754EN/01
15. COMPENSATION FUNCTION
245
(2) In addition to the condition (1), the angle between the start point and
end point on the Tool nose radius center path is quite different from
that between the start point and end point on the programmed path
in circular machining(more than 180 degrees).
Center
N5
N6
N7
r1
r2
Tool nose radius center path
Programmed path
(G41)
N5 G01 U200.0 W800.0 T1 ;
N6 G02 U–160.0 W320.0 I–800.0 K–200.0 T2 ;
N7 G01 U–500.0 W200.0 ;
(Tool compensation value corresponding to T1 : r
1
= 200.0)
(Tool compensation value corresponding to T2 : r
2
= 600.0)
In the above example, the arc in block N6 is placed in the one quadrant.
But after tool nose radius compensation, the arc is placed in the four
quadrants.

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