G76 Threading cycle (cnc programing)
MINOR DIA CALCULATION
PITCH 2.0X0.64=1.28
1.28= THREAD HEIGHT(one side)
1.28X2=2.56(both side)
MAJOR DIA=45.0
- 2.56
MINOR DIA= 42.44
We do THREAD CALCULATION according to the above format, now let's see in the program
G76 P1e 0I 6h Q8R Rk
G76 Xm Zo Px Qw FT
P=
1e= Idle Pass/ finishing pass
0I= champring amount
6h= thread angle/ insert angle
Q=
8R= minimum depth of cut
R=
k= finishing allowance
M=minor diameter of the thread in case exturnal thread . Mejor dai in internal thread
O= thread length
X= hight of thread / depth of thread
W=depth of cut in first pass
T= lead or pitch of thread
Example program m45X2
O008
G28U0. 0W0.0
T0808
GoX48. Z5.
G97S800M04
G0Z3.
G76P030060 Q50R30
G76 X42. 44 Z-15.P1280 Q100
F2. 0
G0X48. Z10.
G97 M05
M09
G28U0. 0W0.0
M01
M30
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