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M72 Back spindle air blow on (Citizen)
Swiss (Citizen Star) M-code · Lathe
Blows air through the back spindle to clear chips before the next pick-off.
Verify on your machine. This entry could not be fully checked against the maker manual. Check your machine manual before you run it.
Format
M72
Addresses
| Address | What it does |
|---|---|
None | No addresses |
How it works
Modal. Cancel with M73.
Example program
M16 (BACK CHUCK OPEN)
M72 (AIR BLOW ON)
G04 U.5 (BLOW)
M73 (AIR BLOW OFF)
M72 (AIR BLOW ON)
G04 U.5 (BLOW)
M73 (AIR BLOW OFF)
Example is in inch. Check offsets and clearances first.
Watch out for
- Chips in the back collet give a bad grip and a part that pulls out.
Machine builders set many M codes, and they change by model and options. Check the M code list for your machine.
Related codes
M72 on other controls
The same number can mean something different on another control.
| Control | Meaning |
|---|---|
| Doosan (Fanuc) | Spindle convert rotation direction |
| DMG Mori MAPPS (Fanuc) | Chip removal coolant ON |
| Mazak (EIA) | Inside chuck clamp |
| Okuma OSP | ATC unit position at approach position |
| LinuxCNC Tormach | Restore modal state |
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