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G72 Face rough cutting cycle
Mitsubishi M70 M80 G-code · Lathe
Roughs along X across the face using a shape from N P to N Q.
Format
G72 W R then G72 P Q U W F
Addresses
| Address | What it does |
|---|---|
W first block | Depth of cut in Z |
R | Retract amount |
P Q | First and last shape sequence numbers |
U W | Finish stock in X and Z |
F | Roughing feed |
How it works
Non-modal, group 00.
Example program
G00 X3.1 Z.1 (START POINT)
G72 W.05 R.02 (DEPTH AND RETRACT)
G72 P10 Q20 U.02 W.005 F.01 (ROUGH FACE)
N10 G00 Z-.5 (SHAPE START)
…
G72 W.05 R.02 (DEPTH AND RETRACT)
G72 P10 Q20 U.02 W.005 F.01 (ROUGH FACE)
N10 G00 Z-.5 (SHAPE START)
…
The full 7-line example is in the app. Example is in inch. Check offsets and clearances first.
Watch out for
- The shape starts with a Z move, not an X move.
Related codes
G72 on other controls
The same number can mean something different on another control.
| Control | Meaning |
|---|---|
| Fanuc | Stock removal in facing, rough cycle |
| Haas NGC | Bolt holes along an angle |
| Mazak (EIA) | Facing roughing cycle, X direction |
| Okuma OSP | Compound thread cycle, transverse |
| Heidenhain TNC (ISO) | Scaling factor |
| Fagor 8055 8065 | Scaling factor |
| LinuxCNC Tormach | Lathe roughing cycle, facing along X |
| Centroid CNC12 Acorn | Rough facing cycle |
| Swiss (Citizen Star) | Rough facing cycle |
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