Specifications

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CONCISE GUIDE FANUC 76
4.8 “G76” THREAD CUTTING CYCLE IN SEVERAL CUTS
Function “G76” activates the thread cutting cycle in several cuts.
This function can be used for external and internal thread cutting.
The thread cutting cycle in several cuts is always composed of two program blocks.
Example:
N17 …….
N18 G0 X.. Z.. .
N19 G76 P… Q… R…
N20 G76 X… Z… R… P… Q… F…
N21 G0 X… Z…
Where:
§ X => Cycle start co-ordinate along axis X (it is also the value reached by the tool in separation at the
end of each cut)
• Z => Cycle start co-ordinate along axis Z
1
st
BLOCK OF G76
• P => Parameter P always has 6 digits (3 pairs of numbers)
1
st
pair : number of finishing cuts (value from 00 to 99, always two digits)
E.g. 00 no finishing cut
01 one finishing cut
02 two finishing cuts
2
nd
pair : tapered exit from thread (value from 00 to 99, always two digits)
E.g. 00 vertical exit from thread
05 tapered exit from thread 0.5 times the cut (value equal to half the cut)
10 tapered exit from thread 1 time the cut (value equal to cut)