HUST Automation H4CL-T Series Manual page 85

Programming example of G76 compound thread cutting canned cycle:
If tool nose angle a=60 ° , Thread pitch F (l)=2 mm.
as shown in the above example, thread height k= 1.732
N10 G0 X30.0 Z60.0
N20 M03 S2000
N30 G76 P011060 Q100 R0.200
N40 G76 X16.536 Z10.000 P1732 Q900 F2.00
N50 M05
N60 M02
Notes on thread cutting are identical to G32 and G92. The chamfering settings
are also applicable to G92 thread cutting canned cycle.
8. Notes on Compound Canned Cycle (G70~G76):
．
Every command of a compound canned cycle must contain correct P, Q, X,
Z, U, W and R values.
．
In G71, G72, G73 blocks, the block defined by P must contain either G00 or
G01.Otherwise, alarm will be generated.
．
G70, G71, G72, and G73 are not allowed in MDI mode. Otherwise, an
alarm is triggered.
．
In G70, G71, G72, or G73, no M98 (call subprograms) and M99 (quit
subprograms) are applicable to blocks defined by P and Q.
X = 20 - 2 × 1.732 = 16.536
X
20
16.536
2
10 50
Fig. 3-42 G76 Programming Example
3 - 39
Chapter III G/M Codes
1.732
Z