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

PROGRAMMING
B–62764EN/01
15. COMPENSATION FUNCTION
363
Specify the maximum distance for which machining is performed with
the same normal direction as that of the preceding block.
D Linear movement
When distance N2, shown below, is smaller than the set value,
machining for block N2 is performed using the same direction as that
for block N1.
N1
N2
N3
Tool–center path
Distance
Programmed path
D
Circular movement
When the diameter of block N2, shown below, is smaller than the set
value, machining for block N2 is performed using the same normal
direction as that for block N1. The orientation of the axis to which
normal–direction control is applied, relative to the normal direction of
block N2, does not change as machining proceeds along the arc.
N1
N2
N3
Tool–center path
Programmed path
Diameter
NOTE
1 Do not specify any command to the C axis during normal
direction control. Any command specified at this time is
ignored.
2 Before processing starts, it is necessary to correlate the
workpiece coordinate of the C axis with the actual position
of the C axis on the machine using the coordinate system
setting (G92) or the like.
3 The helical cutting option is required to use this function.
Helical cutting cannot be specified in the normal direction
control mode.
4 Normal direction control cannot be performed by the G53
move command.
5 The C–axis must be a rotation axis.
D Movement for which arc
insertion is ignored

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