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M1 Optional stop
Mach3 Mach4 M-code · Mill
Stops like M0 only when the optional stop switch is on.
Format
M1
Addresses
| Address | What it does |
|---|---|
M1 | No address words |
How it works
Non modal.
Example program
G0 G20 G90 G54 G17 G40 G49 G80 (SAFE START, INCH)
T1 M6 (TOOL CHANGE)
G43 H1 Z1.0 (LENGTH OFFSET)
G53 G0 Z0 (Z HOME)
…
T1 M6 (TOOL CHANGE)
G43 H1 Z1.0 (LENGTH OFFSET)
G53 G0 Z0 (Z HOME)
…
The full 6-line example is in the app. Example is in inch. Check offsets and clearances first.
Watch out for
- Put M1 before each tool so you can check the first part and run later parts without stops.
Related codes
M1 on other controls
The same number can mean something different on another control.
| Control | Meaning |
|---|---|
| Fanuc | Optional stop |
| Haas NGC | Optional stop |
| Doosan (Fanuc) | Optional program stop |
| DMG Mori MAPPS (Fanuc) | Optional stop |
| Mazak (EIA) | Optional stop |
| Okuma OSP | Optional Stop (Lathes & Mills) |
| Mitsubishi M70 M80 | Optional stop |
| Brother Speedio | Optional stop |
| Siemens 840D 828D | Optional stop |
| Heidenhain TNC (ISO) | Optional program stop |
| Fagor 8055 8065 | Optional stop |
| LinuxCNC Tormach | Optional pause |
| Centroid CNC12 Acorn | Optional stop |
| Hurco WinMax (NC) | Optional stop |
| Fadal | Optional stop |
| Swiss (Citizen Star) | Optional stop |
Every M-code for Mach3 Mach4 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 M1 in the app All Mach3 Mach4 M-codes