Summary Of MCodes
| M-code | Functions |
| M0 | Program stop |
| M1 | Optional program stop |
| M3/M4 | Rotate spindle clockwise/counterclockwise |
| M5 | Stop spindle rotation |
| M6 | Tool change (by two macros) |
| M7 | Mist on |
| M8 | Flood on |
| M9 | Mist & flood off |
| M30 | Program end and rewind |
| M47 | Repeat program from first line |
| M48 | Enable speed and feed override |
| M98 | Call subroutine |
| M99 | Return from subroutine/repeat |
| A | A axis of machine |
| B | B axis of machine |
| C | C axis of machine |
| D | Tool radius compensation number |
| F | Feedrate |
| G | See G-codes table |
| H | Tool length offset index |
| I | X axis offset for arc |
| X offset in G87 canned cycle | |
| J | Y axis offset for arcs |
| Y offset in G87 canned cycle | |
| K | Z axis offset for arcs |
| Z offset in G87 canned cycle | |
| L | Number or repetitions in canned cycles/subroutines |
| L1/L2: tool offset settings / fixture offset (with G10) | |
| M | See M-codes |
| N | Line number |
| O | Subroutine label number |
| P | Dwell time in a canned cycle |
| Dwell time with G4 | |
| Tool / Fixture number (with G10) | |
| Tool radius (with G41 / G42 | |
| Q | Feed increment in G83 canned cycle |
| Repetitions of subroutine call | |
| R | Arc radius |
| Canned cycle retract level | |
| S | Spindle speed |
| T | Tool selection |
| X | X axis of machine |
| Y | Y axis of machine |
| Z | Z axis of machine |