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G12.1 Polar coordinate interpolation on
Mitsubishi M70 M80 G-code · Lathe
Turns X and C into a flat XY style plane so flats and hex shapes can be milled with live tools.
Format
G12.1
How it works
Modal, group 19. Cancel with G13.1.
Example program
G17 G98 (PLANE AND PER MINUTE)
G12.1 (POLAR ON)
G01 X1. C.5 F10. (MILL FLAT)
G13.1 (POLAR OFF)
G12.1 (POLAR ON)
G01 X1. C.5 F10. (MILL FLAT)
G13.1 (POLAR OFF)
Example is in inch. Check offsets and clearances first.
Watch out for
- Command it in a block by itself.
- C axis moves become hypothetical Y values, check units with your builder.
Related codes
G12.1 on other controls
The same number can mean something different on another control.
| Control | Meaning |
|---|---|
| Fanuc | Polar coordinate interpolation on |
| Mazak (EIA) | Polar coordinate interpolation on |
| Swiss (Citizen Star) | Polar coordinate interpolation on |
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