Specifications

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CONCISE GUIDE FANUC 77

pair : thread cut angle (value of two digits, only 6 selections 00,29,30,55,60,80)

E.g. 00 for square thread cutting

55 for Whitworth thread cutting

60 for metric thread cutting

If threads are to be cut with an angle that differs from the 6 selections available, use value 00

In brief : P010060 (1 idle traverse, vertical exit at end of thread , thread with angle of 60°)

• Q => Minimum cut depth (in thousandths)

E.g. Q100=0.1mm.

• R => Depth of finishing cut (radial, in mm)

E.g. R0.02=0.02mm.

BLOCK OF G76

• X => Bottom of thread diameter

• Z => End of thread absolute co-ordinate

• R => Taper of thread cut (radial difference between starting thread cut diameter and diameter at end

of thread cutting). The value must be indicated with a sign. For cylindrical thread cutting

parameter R is not indicated.

R=(START OF THREAD DIAMETER – END OF THREAD DIAMETER) / 2

• P => Radial height of thread (in thousandths and without sign)

The value set for P depends on the type of thread cut and can be:

P=613 for Cut for ISO metric thread

P=640 for Cut for Whitworth thread DIN 11

P=500 for Cut for square thread

Thus : P1226 (for an ISO metric thread pitch 2)

• Q => Radial depth of first cut (in thousandths)

E.g. Q250=0.25mm.

• F => Thread pitch (in mm.)

E.g. F1.5 for thread with 1.5 mm pitch.