G-code

Supported M-codes

2min

M Code
Meaning
﻿M0﻿ 
Program stop
﻿M1﻿ 
Optional program stop
﻿M2﻿ 
Program end
﻿M3﻿ 
Turn spindle clockwise
﻿M4﻿ 
Turn spindle counterclockwise
﻿M5﻿ 
Stop spindle turning
﻿M6﻿ 
Tool change
﻿M7﻿ 
Mist coolant on
﻿M8﻿ 
Flood coolant on
﻿M9﻿ 
Mist and flood coolant off
﻿M20﻿ 
Plasma Torch Height Control ON
﻿M21﻿ 
Plasma Torch Height Control OFF
﻿M22﻿ 
M23 Q… Set Plasma THC set point value
﻿M26﻿ 
Enable rotary axis clamping
﻿M27﻿ 
Disable rotary axis clamping
﻿M30﻿ 
Program end, spindle and coolants off, and rewind
﻿M48﻿ 
Enable speed and feed overrides
﻿M49﻿ 
Disable speed and feed overrides
﻿M50﻿ 
Set feed override
﻿M51﻿ 
Set speed override
﻿M52﻿ 
Enable feed override by analog input
﻿M53﻿ 
Enable feed hold input
﻿M54﻿ 
Set general-purpose output
﻿M55﻿ 
Clear general-purpose output
﻿M56﻿ 
Read general-purpose input
﻿M57﻿ 
Read general-purpose output
﻿M60﻿ 
Program stop, use this with nesting instead of M30 so that the spindle/coolants remain on during the transition from one to the next run
M80
Drive enable ON
M81
Drive enable OFF
﻿M90﻿ 
Standard Head/spindle
﻿M91﻿ 
Alternate Head/2nd spindle
﻿M92﻿ 
Alternate Head/3rd spindle
﻿M93﻿ 
Alternate Head/4th spindle
﻿M95﻿ 
Alternate Head/Probe
﻿M97﻿ 
Alternate Head/Camera
Note that a head may as well be e.g. a tangential knife configuration.
3D printing specials
M Code
Meaning
﻿M104﻿ 
Set extruder temperature
﻿M106﻿ 
Workpiece cooling fan on
﻿M107﻿ 
Workpiece cooling fan off
﻿M109﻿ 
M109 S... Set extruder temperature and wait until reached
﻿M140﻿ 
M140 S... Bed temperature
﻿M143﻿ 
M143 S... Maximum Hot-end temperature to prevent overheating
﻿M190﻿ 
M190 Wait for bed temperature to reach the target value
﻿

M Code	Meaning
M0	Program stop
M1	Optional program stop
M2	Program end
M3	Turn spindle clockwise
M4	Turn spindle counterclockwise
M5	Stop spindle turning
M6	Tool change
M7	Mist coolant on
M8	Flood coolant on
M9	Mist and flood coolant off
M20	Plasma Torch Height Control ON
M21	Plasma Torch Height Control OFF
M22	M23 Q… Set Plasma THC set point value
M26	Enable rotary axis clamping
M27	Disable rotary axis clamping
M30	Program end, spindle and coolants off, and rewind
M48	Enable speed and feed overrides
M49	Disable speed and feed overrides
M50	Set feed override
M51	Set speed override
M52	Enable feed override by analog input
M53	Enable feed hold input
M54	Set general-purpose output
M55	Clear general-purpose output
M56	Read general-purpose input
M57	Read general-purpose output
M60	Program stop, use this with nesting instead of M30 so that the spindle/coolants remain on during the transition from one to the next run
M80	Drive enable ON
M81	Drive enable OFF
M90	Standard Head/spindle
M91	Alternate Head/2nd spindle
M92	Alternate Head/3rd spindle
M93	Alternate Head/4th spindle
M95	Alternate Head/Probe
M97	Alternate Head/Camera

M Code	Meaning
M104	Set extruder temperature
M106	Workpiece cooling fan on
M107	Workpiece cooling fan off
M109	M109 S... Set extruder temperature and wait until reached
M140	M140 S... Bed temperature
M143	M143 S... Maximum Hot-end temperature to prevent overheating
M190	M190 Wait for bed temperature to reach the target value

G98, G99 (Set Canned Cycle Return Level)

M0, M1, M2, M30, M60 (Program Stopping and Ending)