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G91.1 Incremental arc center mode
LinuxCNC Tormach G-code · Mill and lathe
Arc I J K words are offsets from the arc start point. This is the default.
Format
G91.1
Addresses
| Address | What it does |
|---|---|
none | No words |
How it works
Modal, arc distance group. Default.
Example program
G20 G17 G40 G49 G54 G80 G90 G94 (INCH, SAFE START)
G91.1 (CENTERS FROM START POINT)
G0 X1 Y0 Z-0.1
G2 X-1 Y0 I-1 J0 F20 (CENTER 1 INCH LEFT OF START)
G91.1 (CENTERS FROM START POINT)
G0 X1 Y0 Z-0.1
G2 X-1 Y0 I-1 J0 F20 (CENTER 1 INCH LEFT OF START)
Example is in inch. Check offsets and clearances first.
Watch out for
- Add G91.1 to the safe start line if any program uses G90.1.
Related codes
G91.1 on other controls
The same number can mean something different on another control.
| Control | Meaning |
|---|---|
| Mach3 Mach4 | Incremental arc centers |
| Fadal | High speed execution |
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