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GSK980TDi Turning CNC System User Manual
134
Ⅰ
Programming
different;
Related definitions:
F: Metric pitch is moving distance of long axis when the spindle rotates one rev: 0.001 mm
～
500
mm. After F is executed, it is valid until F with specified pitch is executed again.
I: Teeth per inch. It is ones per inch(25.4 mm) in long axis, and also is circles of spindle rotation
when the long axis traverses one inch(25.4 mm) :0.06tooth/inch
～
25400tooth/inch. After I is
executed, it is valid until I with specified pitch is executed again. The metric, inch input both
express the teeth per inch thread.
J: Movement in the short axis in thread run-out, its range:
（
-99999999~99999999
）
× least input
increment with negative sign; if the short axis is X, its value is specified with the radius; J value
is the modal parameter.
K: Length in the long axis in thread run-out, its range: 0~99999999× least input increment. If the
long axis is X, its value is in radius without direction; K is modal parameter.
Q: Initial angle(offset angle)between spindle rotation one rev and starting point of thread cutting:
0
～
360000 (unit: 0.001 degree). Q is non-modal parameter, must be defined every time,
otherwise it is 0
0
.
Q rules:
1. Its initial angle is 0° if Q is not specified;
2. For continuous thread cutting, Q specified by its following thread cutting block except for the
first block is invalid, namely Q is omitted even if it is specified;
3. Multi threads formed by initial angle is not more than 65535;
4. Q unit : 0.001
0
. Q180000 is input in program if it offsets 180
0
with spindle one-turn; if Q180 or
Q180.0, it is 0.18°.
Difference between long axis and short axis is shown in Fig. 3-82.
X a x i s
C u r r e n t p o i n t
Z a x i s
W
U/2
X
Z
Fx
F z
a
End
poi
nt
Fig. 3-82 G32 path
Notes:
1. J, K are modal. The thread run-out is previous J, K value when they are omitted in the
next block in continuous thread cutting. Their mode are cancelled when no thread
Tool path
End point of G32 program
J
K
