CNC M-Codes
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2024-05-04
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CNC Machining Knowledge
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M-codes, Auxiliary functions
- When actually processing the workpiece, it is necessary to tighten the chuck, rotate the spindle and supply coolant.
- For ON/OFF switch action control of mechanical functions, use the two-digit command after the address M,
- One M code can usually be specified in a single block.
Standard M-codes List
| Command | Function | Description |
| M01 | Program stop | All functions and feed are paused, click start will run |
| M00 | Optional stop | The same as M01, but is controlled by the controlling panel |
| M03 | Spindle Forward | Spindle rotate counter-clockwise |
| M04 | Spindle Reversal | Spindle rotate clockwise |
| M05 | Spindle stop | Spindle stop rotating |
| M08 | Coolant on | Open the coolant |
| M09 | Coolant off | Close the coolant |
| M30 | End of program | Spindle stop, coolant off, all functions and feed are paused, cursor return to the initial position |
| M40 | Spindle drive gear: Neutral | Change spindle drive to neutral condition, please do stop the spindle before changing the drive gear |
| M41 | Spindle drive gear: Low Speed | Change spindle drive to low speed, please do stop the spindle before changing the drive gear |
| M42 | Spindle drive gear: High Speed | Change spindle drive to high speed, please do stop the spindle before changing the drive gear |
| M98 | Subprogram call | Run from main program to subprogram |
| M99 | Subprogram end | End of the subprogram, return to main program |
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