# Implemented G Codes ## G Codes * G0 -> G1 * G1 - Coordinated Movement X Y Z E * G2 - CW ARC * G3 - CCW ARC * G4 - Dwell S[seconds] or P[milliseconds] * G10 - retract filament according to settings of M207 * G11 - retract recover filament according to settings of M208 * G28 - Home all Axis * G29 - Detailed Z-Probe, probes the bed at 3 points. You must be at the home position for this to work correctly. * G30 - Single Z Probe, probes bed at current XY location. * G31 - Dock Z Probe sled (if enabled) * G32 - Undock Z Probe sled (if enabled) * G90 - Use Absolute Coordinates * G91 - Use Relative Coordinates * G92 - Set current position to cordinates given ## M Codes * M0 - Unconditional stop - Wait for user to press a button on the LCD (Only if ULTRA_LCD is enabled) * M1 - Same as M0 * M17 - Enable/Power all stepper motors * M18 - Disable all stepper motors; same as M84 * M20 - List SD card * M21 - Init SD card * M22 - Release SD card * M23 - Select SD file (M23 filename.g) * M24 - Start/resume SD print * M25 - Pause SD print * M26 - Set SD position in bytes (M26 S12345) * M27 - Report SD print status * M28 - Start SD write (M28 filename.g) * M29 - Stop SD write * M30 - Delete file from SD (M30 filename.g) * M31 - Output time since last M109 or SD card start to serial * M32 - Select file and start SD print (Can be used when printing from SD card) * M42 - Change pin status via gcode Use M42 Px Sy to set pin x to value y, when omitting Px the onboard led will be used. * M80 - Turn on Power Supply * M81 - Turn off Power Supply * M82 - Set E codes absolute (default) * M83 - Set E codes relative while in Absolute Coordinates (G90) mode * M84 - Disable steppers until next move, or use S[seconds] to specify an inactivity timeout, after which the steppers will be disabled. S0 to disable the timeout. * M85 - Set inactivity shutdown timer with parameter S[seconds]. To disable set zero (default) * M92 - Set axis_steps_per_unit - same syntax as G92 * M104 - Set extruder target temp * M105 - Read current temp * M106 - Fan on * M107 - Fan off * M109 - Sxxx Wait for extruder current temp to reach target temp. Waits only when heating * Rxxx Wait for extruder current temp to reach target temp. Waits when heating and cooling * M112 - Emergency stop * M114 - Output current position to serial port * M115 - Capabilities string * M117 - display message * M119 - Output Endstop status to serial port * M126 - Solenoid Air Valve Open (BariCUDA support by jmil) * M127 - Solenoid Air Valve Closed (BariCUDA vent to atmospheric pressure by jmil) * M128 - EtoP Open (BariCUDA EtoP = electricity to air pressure transducer by jmil) * M129 - EtoP Closed (BariCUDA EtoP = electricity to air pressure transducer by jmil) * M140 - Set bed target temp * M190 - Sxxx Wait for bed current temp to reach target temp. Waits only when heating * Rxxx Wait for bed current temp to reach target temp. Waits when heating and cooling * M200 - D[millimeters]- set filament diameter and set E axis units to cubic millimeters (use S0 to set back to millimeters). * M201 - Set max acceleration in units/s^2 for print moves (M201 X1000 Y1000) * M202 - Set max acceleration in units/s^2 for travel moves (M202 X1000 Y1000) Unused in Marlin!! * M203 - Set maximum feedrate that your machine can sustain (M203 X200 Y200 Z300 E10000) in mm/sec * M204 - Set default acceleration: P for Printing moves, R for Retract only (no X, Y, Z) moves and T for Travel (non printing) moves (ex. M204 P800 T3000 R9000) in mm/sec^2 * M205 - advanced settings: minimum travel speed S=while printing T=travel only, B=minimum segment time X= maximum xy jerk, Z=maximum Z jerk, E=maximum E jerk * M206 - set additional homing offset * M207 - set retract length S[positive mm] F[feedrate mm/min] Z[additional zlift/hop], stays in mm regardless of M200 setting * M208 - set recover=unretract length S[positive mm surplus to the M207 S*] F[feedrate mm/min] * M209 - S[1=true/0=false] enable automatic retract detect if the slicer did not support G10/11: every normal extrude-only move will be classified as retract depending on the direction. * M218 - set hotend offset (in mm): T[extruder_number] X[offset_on_X] Y[offset_on_Y] * M220 - S[factor in percent] - set speed factor override percentage * M221 - S[factor in percent] - set extrude factor override percentage * M240 - Trigger a camera to take a photograph * M280 - Position an RC Servo P[index] S[angle/microseconds], ommit S to report back current angle * M300 - Play beep sound S[frequency Hz] P[duration ms] * M301 - Set PID parameters P I and D * M302 - Allow cold extrudes * M303 - PID relay autotune S[temperature] sets the target temperature. (default target temperature = 150C) * M304 - Set bed PID parameters P I and D * M350 - Set microstepping mode. * M351 - Toggle MS1 MS2 pins directly. * M400 - Finish all moves * M401 - Lower z-probe if present * M402 - Raise z-probe if present * M404 - N[dia in mm] Enter the nominal filament width (3mm, 1.75mm) or will display nominal filament width without parameters * M405 - Turn on Filament Sensor extrusion control. Optional D[delay in cm] to set delay in centimeters between sensor and extruder * M406 - Turn off Filament Sensor extrusion control * M407 - Displays measured filament diameter * M500 - stores paramters in EEPROM * M501 - reads parameters from EEPROM (if you need reset them after you changed them temporarily). * M502 - reverts to the default "factory settings". You still need to store them in EEPROM afterwards if you want to. * M503 - print the current settings (from memory not from EEPROM) * M540 - Use S[0|1] to enable or disable the stop SD card print on endstop hit (requires ABORT_ON_ENDSTOP_HIT_FEATURE_ENABLED) * M600 - Pause for filament change X[pos] Y[pos] Z[relative lift] E[initial retract] L[later retract distance for removal] * M907 - Set digital trimpot motor current using axis codes. * M908 - Control digital trimpot directly. * M928 - Start SD logging (M928 filename.g) - ended by M29 * M999 - Restart after being stopped by error # Comments Comments start at a `;` (semicolon) and end with the end of the line: N3 T0*57 ; This is a comment N4 G92 E0*67 ; So is this N5 G28*22 (example taken from the [RepRap wiki](http://reprap.org/wiki/Gcode#Comments)) If you need to use a literal `;` somewhere (for example within `M117`), you can escape semicolons with a `\` (backslash): M117 Hello \;) `\` can also be used to escape `\` itself, if you need a literal `\` in front of a `;`: M117 backslash: \\;and a comment Please note that hosts should strip any comments before sending GCODE to the printer in order to save bandwidth.