--- title: Supported M-codes slug: supported-m-codes docTags: createdAt: 2022-03-24T17:49:56.000Z --- | M Code | Meaning | | ------------------------------------ | ---------------------------------------------------------------------------------------------------------------------------------------- | | [M0](docId\:LHmMbAy23Q7kqBe9WDV0_) | Program stop | | [M1](docId\:LHmMbAy23Q7kqBe9WDV0_) | Optional program stop | | [M2](docId\:LHmMbAy23Q7kqBe9WDV0_) | Program end | | [M3](docId\:LCGnVkPx_hp4rq3G5m9QV) | Turn spindle clockwise | | [M4](docId\:LCGnVkPx_hp4rq3G5m9QV) | Turn spindle counterclockwise | | [M5](docId\:LCGnVkPx_hp4rq3G5m9QV) | Stop spindle turning | | [M6](docId\:kQG7dD1dpwUw3hchbArUT) | Tool change | | [M7](docId\:CKpEEqps6uVHTMidSiRnR) | Mist coolant on | | [M8](docId\:CKpEEqps6uVHTMidSiRnR) | Flood coolant on | | [M9](docId\:CKpEEqps6uVHTMidSiRnR) | Mist and flood coolant off | | M10 | Laser off (PWM off) | | M11 | Laser on with Power S | | [M20](docId:4KZjVMWs8l4YNN6N5ZmcB) | Plasma Torch Height Control ON | | [M21](docId:4KZjVMWs8l4YNN6N5ZmcB) | Plasma Torch Height Control OFF | | [M22](docId:4KZjVMWs8l4YNN6N5ZmcB) | M23 Q… Set Plasma THC set point value | | [M26](docId\:b-HT95-u-CRzgtMitKpI8) | Enable rotary axis clamping | | [M27](docId\:b-HT95-u-CRzgtMitKpI8) | Disable rotary axis clamping | | [M30](docId\:LHmMbAy23Q7kqBe9WDV0_) | Program end, spindle and coolants off, and rewind | | [M48](docId\:C9jbUdjZJbt5_JzMT_hWm) | Enable speed and feed overrides | | [M49](docId\:C9jbUdjZJbt5_JzMT_hWm) | Disable speed and feed overrides | | [M50](docId\:C9jbUdjZJbt5_JzMT_hWm) | Set feed override | | [M51](docId\:C9jbUdjZJbt5_JzMT_hWm) | Set speed override | | [M52](docId\:C9jbUdjZJbt5_JzMT_hWm) | Enable feed override by analog input | | [M53](docId\:C9jbUdjZJbt5_JzMT_hWm) | Enable feed hold input | | [M54](docId\:pkHadTeLJOSp0wTTu_1dJ) | Set general-purpose output | | [M55](docId\:pkHadTeLJOSp0wTTu_1dJ) | Clear general-purpose output | | [M56](docId\:pkHadTeLJOSp0wTTu_1dJ) | Read general-purpose input | | [M57](docId\:pkHadTeLJOSp0wTTu_1dJ) | Read general-purpose output | | [M60](docId\:LHmMbAy23Q7kqBe9WDV0_) | 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](docId\:LCGnVkPx_hp4rq3G5m9QV) | Standard Head/spindle | | [M91](docId\:LCGnVkPx_hp4rq3G5m9QV) | Alternate Head/2nd spindle | | [M92](docId\:LCGnVkPx_hp4rq3G5m9QV) | Alternate Head/3rd spindle | | [M93](docId\:LCGnVkPx_hp4rq3G5m9QV) | Alternate Head/4th spindle | | [M95](docId\:LCGnVkPx_hp4rq3G5m9QV) | Alternate Head/Probe | | [M97](docId\:LCGnVkPx_hp4rq3G5m9QV) | Alternate Head/Camera | :::hint{type="info"} Note that a head may as well be e.g. a tangential knife configuration. ::: ## 3D printing specials | M Code | Meaning | | ------------------------------------- | ------------------------------------------------------------ | | [M104](docId\:HHDBn9QPO179onaPOasZL) | Set extruder temperature | | [M106](docId\:HHDBn9QPO179onaPOasZL) | Workpiece cooling fan on | | [M107](docId\:HHDBn9QPO179onaPOasZL) | Workpiece cooling fan off | | [M109](docId\:HHDBn9QPO179onaPOasZL) | M109 S... Set extruder temperature and wait until reached | | [M140](docId\:HHDBn9QPO179onaPOasZL) | M140 S... Bed temperature | | [M143](docId\:HHDBn9QPO179onaPOasZL) | M143 S... Maximum Hot-end temperature to prevent overheating | | [M190](docId\:HHDBn9QPO179onaPOasZL) | M190 Wait for bed temperature to reach the target value |