GSK GSK980TDc, Manual

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Chapter 3 G Commands
125
Ⅰ
Progra
mming
3.21.6 Thread cutting cycle G92
Command format: G92 X(U) _ Z(W) _ F_ J_ K_ L ; (Metric straight thread cutting cycle)
G92 X(U) _ Z(W) _ I_ J_ K_ L ; (Inch straight thread cutting cycle)
G92 X(U) _ Z(W) _ R_ F_ J_ K_ L ; (Metric taper thread cutting cycle)
G92 X(U) _ Z(W) _ R_ I_ J_ K_ L ; (Metric taper thread cutting cycle)
Command function: Tool infeeds in radial(X) direction and cuts in axial(Z or X, Z) direction from
starting point of cutting to realize straight thread, taper thread cutting cycle with
constant thread pitch. Thread run-out in G92: at the fixed distance from end
point of thread cutting, Z executes thread interpolation and X retracts with
exponential or linear acceleration, and X retracts at rapidly traverse speed after
Z reaches to end point of cutting as Fig. 3-44.
Command specifications:
G92 is modal;
Starting point of cutting: starting position of thread interpolation;
End point of cutting: end position of thread interpolation;
X: X absolute coordinate of end point of cutting, unit: mm;
U: different value of X absolute coordinate from end point to starting point of cutting, unit: mm;
Z: Z absolute coordinate of end point of cutting, unit: mm;
W: Different value of X absolute coordinate from end point to starting point of cutting, unit: mm;
R: Different value(radius value) of X absolute coordinate from end point to starting point of cutting.
When the sign of R is not the same that of U, R │≤│ U/2 │ , unit: mm;
F: Thread lead, its range: 0 ＜ F ≤ 500 mm. After F value is executed, it is reserved and can be
omitted;
I: Thread teeth per inch, its range: 0.06tooth/inch ～ 25400tooth/inch , it is reserved and it can be
omitted not to input after I specified value is executed;
J: Movement in the short axis in thread run-out, its range 0~99999999× least input increment ,
unit: mm/inch, without direction ( automatically define its direction according to starting position
of program), and it is modal parameter. If the short axis is X, its value is specified by radius;
K: Movement in the long axis in thread run-out, its range: 0~99999999× least input increment ,
unit: mm/inch, without direction ( automatically define its direction according to starting position
of program), and it is modal parameter. If the long axis is X, its value is specified by radius;
L: Multi threads: 1 ～ 99 and it is modal parameter. (The system defaults it is single thread when L
is omitted).