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M11 4th axis brake release / Chuck unclamp
Haas NGC M-code · Mill, Lathe
On mills: 4th axis brake release
Releases the 4th axis brake.
Format
M11
How it works
Modal, until M10.
Example program
M11 (RELEASE 4TH AXIS BRAKE)
G01 A180. F50. (ROTARY MOVE)
M10 (BRAKE ON)
G01 A180. F50. (ROTARY MOVE)
M10 (BRAKE ON)
Example is in inch. Check offsets and clearances first.
Watch out for
- Release the brake before simultaneous rotary cutting.
On lathes: Chuck unclamp
Unclamps the main spindle chuck. The spindle must be stopped.
Format
M11
How it works
Non-modal.
Example program
M05 (SPINDLE STOP)
M11 (UNCLAMP CHUCK)
M00 (LOAD NEXT PART)
M10 (CLAMP CHUCK)
M11 (UNCLAMP CHUCK)
M00 (LOAD NEXT PART)
M10 (CLAMP CHUCK)
Example is in inch. Check offsets and clearances first.
Watch out for
- Never unclamp with the part unsupported unless a catcher or sub spindle holds it.
Related codes
M11 on other controls
The same number can mean something different on another control.
| Control | Meaning |
|---|---|
| Fanuc | Chuck unclamp |
| Doosan (Fanuc) | Parts unloader return to home |
| DMG Mori MAPPS (Fanuc) | C-axis unclamp |
| Centroid CNC12 Acorn | Clamp or chuck off |
| Hurco WinMax (NC) | Air through spindle |
| Fadal | Reciprocation, X axis |
| Swiss (Citizen Star) | Back knock-out off (Citizen) |
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