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M1 Optional stop
Centroid CNC12 Acorn M-code · Mill and lathe
Stops like M0 only when optional stop is turned on at the control.
Format
M1
Addresses
| Address | What it does |
|---|---|
none | No words |
How it works
One shot.
Example program
G0 Z1. ; CLEAR
M5 ; SPINDLE OFF
M1 ; CHECK THE FIRST PART IF OPTIONAL STOP IS ON
M5 ; SPINDLE OFF
M1 ; CHECK THE FIRST PART IF OPTIONAL STOP IS ON
Example is in inch. Check offsets and clearances first.
Watch out for
- If you replace M1 with a macro, call M1 inside it or optional stop stops working.
Machine builders set many M codes, and they change by model and options. Check the M code list for your machine.
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 |
| Mach3 Mach4 | Optional stop |
| Hurco WinMax (NC) | Optional stop |
| Fadal | Optional stop |
| Swiss (Citizen Star) | Optional stop |
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Open M1 in the app All Centroid CNC12 Acorn M-codes