Official GSK Agents in South Africa
Tel: +27 11 626 2720, [email protected]
Chapter 3 G Commands
141
Ⅰ
Programming
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;
G00 U-10;
G65 H03 P#101 Q#100 R0.2;
G65 H01 P#102 Q#101;
G65 H86 P20 Q#102 R0.2;
G65 H80 P10;
N20 G65 H01 P#102 R0.2;
G65 H80 P10;
N30 ;
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
3.23.5 Z Thread Cutting G33
Command format
：
G33 Z(W)__ F(I)__ L__ ;
Command function:
Tool path is from starting point to end point and then from end point to
starting point. The tool traverses one pitch when the spindle rotates one rev, the pitch
is consistent with pitch of tool and there is spiral grooving in internal hole of
workpiece and the internal machining can be completed one time.
Command specification:
G33 is modal command;
Z(W): When Z or W is not input and starting point and end point of Z axis are the same one, the
thread cutting must not be executed;
F: Thread pitch, and its range is referred to Table 1-2;
I: Specify thread teeth per inch, and its range is referred to Table 1-2;
L: Multi threads: 1
～
99 and it is modal parameter. (The system defaults it is single thread when L
is omitted)
Cycle process:
Z tool infeed (start spindle before G33 is executed);
①
②
M05 signal outputs after Z reaches the specified end point in programming;
③
Test spindle after completely stopping;
④
Spindle rotation (CCW) signal outputs (reverse to the original rotation direction);
Z executes the tool retracts to starting point
⑤
;
⑥
M05 signal outputs and the spindle stops;
⑦
Repeat the steps
①
～
⑥
if multi threads are machined.
Example:
Fig. 3-87, thread M10×1.5
Fig.3-87
Program
:
