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

PROGRAMMING
B–62754EN/01
15. COMPENSATION FUNCTION
249
When the radius of a corner is smaller than the cutter radius, because the
inner offsetting of the cutter will result in overcuttings, an alarm is
displayed and the CNC stops at the start of the block. In single block
operation, the overcutting is generated because the tool is stopped after
the block execution.
Programmed path
Tool nose radius center path
Workpiece
An alarm is generated
and the operation
stops
An alarm is generated and
the operation stops here in
single block operation
If the CNC does not
stop, overcutting occurs
Since the tool nose radius compensation forces the path of the center of
the tool to move in the reverse of the programmed direction, overcutting
will result. In this case an alarm is displayed and the CNC stops at the start
of the block.
Tool nose radius center path
Programmed path
Workpiece
An alarm is displayed and the
operation stops
Overcutting if the operation would not stop
15.3.6
Overcutting by Tool
Nose Radius
Compensation
Explanations
D Machining an inside
corner at a radius
smaller than the tool
nose radius
D Machining a groove
smaller than the tool
nose radius

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