
4. PROGRAM FORMAT
107
Function Explanation
Canned cycle for lathes
(G70 to G76)
(G90, G92, G94)
Canned cycle
G90: Outer diameter/internal diameter cutting
cycle
G92: Thread cutting cycle
G94: End face turning cycle
Multiple repetitive cycle
G70: Finishing
G71: Stock removal in turning
G72: Stock removal in facing
G73: Pattern repeating
G74: End face peck drilling cycle
G75: Outer diameter/internal diameter drilling
cycle
G76: Multiple thread cutting cycle
(Example) G92
X axis
Z W
Zero point
3(R)
4(R)
3(R)
1(R)
U/2
X/2
Z axis
Approx.
45_,
r
L
R Rapid
traverse
F Specified
by F code
(The chamfered angle in
the left figure is 45 degrees or less because of the
delay in the servo system.)
Detailed chamfered thread
Canned cycle for
grinding
(G71 – G74)
G71: Traverse grinding cycle
G72: Traverse direct fixed-dimension grinding
cycle
G73: Oscillation grinding cycle
G74: Oscillation direct fixed-dimension grinding
cycle
(Example) G71
G71A__B__W__U__I__K__H__ ;
X
Z
A
B
U
(K)
(K)
W
(I)
(I)
(Dwell)