
B-63944EN-1/02 PROGRAMMING 4.FUNCTIONS TO SIMPLIFY PROGRAMMING
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4.1.2 Threading Cycle (G92)
4.1.2.1 Straight threading cycle
Format
G92 X(U)_Z(W)_F_Q_;
X_,Z_ : Coordinates of the cutting end point (point A' in the
figure below) in the direction of the length
U_,W_ : Travel distance to the cutting end point (point A' in
the figure below) 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 figure below)
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
Fig. 4.1.2 (c) Straight threading
Explanation
The ranges of thread leads and restrictions related to the spindle speed
are the same as for threading with G32.
- Operations
A straight threading cycle performs four operations:
(1) Operation 1 moves the tool from the start point (A) to the
specified coordinate of the second axis on the plane (specified
X-coordinate for the ZX plane) in rapid traverse.
(2) Operation 2 moves the tool to the specified coordinate of the first
axis on the plane (specified Z-coordinate for the ZX plane) in
cutting feed. At this time, thread chamfering is performed.