GSK GSK988TA, Manual

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GSK988TA/GSK988TA1/GSK988TB Turning Center CNC System User Manual 【 Programming & Operation 】
104
Ⅰ
Programming
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. 2-60 and
Fig.2-61.
Command format ： G92 X （ U ） _ Z （ W ） _ F_ J_ K_ L Q ； （ straight thread cutting cycle ）
G92 X
（
U
）
_ Z
（
W
）
_ R_ F_ J_ K_ L Q
；（
taper thread cutting cycle
）
Code specifications: G92 is modal;
X X absolute coordinate of end point of cutting
U Different value of X absolute coordinate from end point to start point of cutting
Z Z absolute coordinate of end point of cutting
W Different value of Z absolute coordinate from end point to start point of cutting
R
Different value(R value) of X absolute coordinate from end point to start point of cutting. When
the sign of R is not consistent with U, R
│≤│ U/2 │
F Metric thread pitch is the same that of G32. After F value is executed, it is reserved and can be
omitted
J Travel in the short axis in thread run-out is same that of G32 and cannot be less than 0 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 Travel in the long axis in thread run-out is same that of G32 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)
Q Shift angle of initial angle at the beginning of thread cutting. Its range is referred to G32
The system can machine one thread with many tool infeed in G92, but cannot do continuous two
thread and end face thread. Definition of thread pitch in G92 is the same that of G32, and a pitch is
defined that it is a moving distance of long axis(X in radius) when the spindle rotates one rotation.
Pitch of taper thread is defined that it is a moving distance of long axis(X in radius). When
absolute value of Z coordinate difference between B point and C point is more than that of X (in
radius), Z is long axis; and reversely, X is the long axis.
Z W
④
Z axis
Thread
run-out width
A
①
②
③
B C
D
X/2
U/2
Rapid traverse
Thread cutting
A:start point(End point)
B:start point of cutting
C:End point of cutting
Fig. 2-60 Straight thread