
5.PROGRAM INPUT NC FUNCTION B-63942EN/02
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5.35.2 Threading Cycle
Format
- Straight threading cycle
X/2
X axis
Z axis
Z
L
1(R)
2(F)
3(R)
4(R)
Detailed chamfered thread
(The chamfered angle in the left figure is 45
degrees or less because of the delay in the
servo system.)
W
Approx.
45°
(R) ... Rapid traverse
(F).... Cutting feed
’
U/2
r
G78 X(U)_ Z(W)_ F_ Q_ ; (G90 with G code system A)
X_,Z_ : Coordinates of the cutting end point (point A' in the
above figure) in the direction of the length
U_,W_ : Travel distance to the cutting end point (point A' in
the above figure) in the direction of the length
Q_ : Angle for shifting the threading start angle
(Increment: 0.001 degrees,
Valid setting range: 0 to 360 degrees)
F_ : Thread lead (L in the above figure)