CNC Machinist Calculator UltraG91 Incremental positioning
Fadal G-code · Mill
Axis words are distances from the current position.
Format
G91
How it works
Modal, distance group.
Example program
N20 G0 Z.1 M9
N21 G91 G28 Z0. M5 (INCREMENTAL Z HOME)
N22 G90 (BACK TO ABSOLUTE)
N23 M30
N21 G91 G28 Z0. M5 (INCREMENTAL Z HOME)
N22 G90 (BACK TO ABSOLUTE)
N23 M30
Example is in inch. Check offsets and clearances first.
Watch out for
- Go back to G90 right after G91 G28 Z0.
- In fixed cycles G91 makes Z and R0 incremental too.
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 |
| Hurco WinMax (NC) | Incremental mode |
Every G-code for Fadal in your pocket. The app has the full example programs, search by number or shop word, a line decoder and calculators for tapping, threading and drilling.
Open G91 in the app All Fadal G-codes