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G72 Rough facing cycle
Centroid CNC12 Acorn G-code · Lathe
Roughs with passes along X, stepping in Z, inside the profile from block P to Q. Ends with one rough pass along the profile. Finish with G70.
Format
G72 W R then G72 P Q [U] [W] [I] [K] F
Addresses
| Address | What it does |
|---|---|
W line 1 | Depth of cut in Z |
R | Escape amount |
P Q | First and last block numbers of the profile |
U W | Finish stock in X and Z |
F | Roughing feed |
How it works
One shot.
Example program
T0101 ; ROUGH TOOL
G50 S3000
G96 S500 M3
G0 X3. Z0 M8 ; START POINT
…
G50 S3000
G96 S500 M3
G0 X3. Z0 M8 ; START POINT
…
The full 9-line example is in the app. Example is in inch. Check offsets and clearances first.
Watch out for
- Defaults for depth, escape and escape angle come from parameters 43, 44 and 58.
- F, S, T and G4 inside the profile are ignored by G72, even on the last rough pass.
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 |
| Mitsubishi M70 M80 | Face rough cutting cycle |
| Heidenhain TNC (ISO) | Scaling factor |
| Fagor 8055 8065 | Scaling factor |
| LinuxCNC Tormach | Lathe roughing cycle, facing along X |
| Swiss (Citizen Star) | Rough facing cycle |
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Open G72 in the app All Centroid CNC12 Acorn G-codes