G91 Incremental programming

Mazak (EIA) G-code · Mill

Each position is a distance from the current position. Used for G28 and for repeated patterns in subprograms.

Format

G91

Addresses

Address	What it does
`G91`	No addresses

How it works

Modal, group 03.

Example program

G91 G28 Z0. (Z HOME, INCREMENTAL)
G28 X0. Y0. (X Y HOME)
G90 (ABSOLUTE AGAIN)

Example is in inch. Check offsets and clearances first.

Watch out for

Always return to G90 after the incremental moves.
In G91 a canned cycle R and Z are distances too.

Related codes

G90 · G28

G91 on other controls

The same number can mean something different on another control.

Control	Meaning
Fanuc	Incremental programming
Haas NGC	Incremental positioning
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
Fadal	Incremental positioning

Every G-code for Mazak (EIA) 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 Mazak G-codes

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