GSK GSK980TDc, Manual

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GSK980TDc Turning CNC System User Manual
120
Ⅰ
Progra
mming
Fig. 3-41 Variable pitch thread
Note: It is the same as that of G32.
Example: First pitch of starting point : 4mm, increment 0.2mm per rev of spindle.
δ 2
X
Z
δ 1
5 0
7 0
Fig. 3-42 Variable pitch thread machining
Use macro variables to simplify programming when G34 is used many times. δ 1 = 4mm, δ 2 =
4mm, total cutting depth 4mm, total cutting cycle 15 times; first tool infeed 0.8mm, gradual decreasing
cutting every time 0.2mm, min. infeed 0.2mm.
Program
：
O0010
；
G00 X60 Z4 M03 S500;
G65 H01 P#102 Q800;
G65 H01 P#103 Q0;
N10 G65 H02 P#104 Q#103 R1;
G65 H01 P#103 Q#104;
G65 H81 P30 Q#104 R15;
G00 U-10;
G65 H01 P#100 Q#102;
G00 U-#100;
G34 W-78 F3.8 J5 K2 R0.2;
G00 U10;
Z4;
G65 H03 P#101 Q#100 R200;
G65 H01 P#102 Q#101;
G65 H86 P20 Q#102 R200;
G65 H80 P10;
N20 G65 H01 P#102 R200;
G65 H80 P10;
N30 M30;
First tool infeed: assignment #102=0.8mm
Cycle count: assignment #103=0
Cycle count starting: #104=#103+1
#103=#104
Total cutting cycle times: #104=15,jump to block N30
Tool infeed to
Ф 50
Cutting infeed: #100=#102
Tool infeed
Variable pitch cutting
Tool retraction
Z returns to starting point
Decreasing of cutting feed again: #101=#100-0.2
Assignment again #102=#101
Infeed: Jump to block N20 when #102 0.2mm
≦
Unconditionally jump to block N10
Min. infeed: #102=0.2
Unconditionally jump to block N10
Starting point of
machining