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G91 Incremental mode
Hurco WinMax (NC) G-code · Mill
Positions are distances from the last point.
Format
G91
Addresses
| Address | What it does |
|---|---|
none | No words |
How it works
Modal, group 03. Cancel with G90.
Example program
G90 G00 X1. Y1. (ABSOLUTE START)
G91 G01 X1. Y.5 F10. (MOVE PLUS 1. AND PLUS .5)
G91 G28 Z0. (Z TO REFERENCE)
G90 (BACK TO ABSOLUTE)
G91 G01 X1. Y.5 F10. (MOVE PLUS 1. AND PLUS .5)
G91 G28 Z0. (Z TO REFERENCE)
G90 (BACK TO ABSOLUTE)
Example is in inch. Check offsets and clearances first.
Watch out for
- Go back to G90 after G91 G28 Z0. or the next move is incremental.
- In ISNC hole cycles G91 makes R and Z negative distances.
Related codes
G91 on other controls
The same number can mean something different on another control.
| Control | Meaning |
|---|---|
| Fanuc | Incremental programming |
| Haas NGC | Incremental positioning |
| Mazak (EIA) | Incremental programming |
| Okuma OSP | Incremental programming |
| Mitsubishi M70 M80 | Incremental programming |
| Brother Speedio | Incremental programming |
| Siemens 840D 828D | Incremental dimensions |
| Heidenhain TNC (ISO) | Incremental dimensions |
| Fagor 8055 8065 | Incremental programming |
| LinuxCNC Tormach | Incremental distance mode |
| Mach3 Mach4 | Incremental mode |
| Centroid CNC12 Acorn | Incremental positioning |
| Fadal | Incremental positioning |
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