From the printer’s Marlin-sourcecode I’ve nicked the following information:
// look here for descriptions of G-codes: http://linuxcnc.org/handbook/gcode/g-code.html // http://objects.reprap.org/wiki/Mendel_User_Manual:_RepRapGCodes //Implemented 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 or more points. Will fail if you haven't homed yet. // G30 - Single Z Probe, probes bed at current XY location. // G31 - Dock sled (Z_PROBE_SLED only) // G32 - Undock sled (Z_PROBE_SLED only) // G90 - Use Absolute Coordinates // G91 - Use Relative Coordinates // G92 - Set current position to coordinates 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 _while_ printing from SD card files): // syntax "M32 /path/filename#", or "M32 S<startpos bytes> !filename#" // Call gcode file : "M32 P !filename#" and return to caller file after finishing (similar to #include). // The '#' is necessary when calling from within sd files, as it stops buffer prereading // 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 // IF AUTOTEMP is enabled, S<mintemp> B<maxtemp> F<factor>. Exit autotemp by any M109 without F // 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 // M150 - Set BlinkM Color Output R: Red<0-255> U(!): Green<0-255> B: Blue<0-255> over i2c, G for green does not work. // 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: S normal moves T filament only moves (M204 S3000 T7000) in mm/sec^2 also sets minimum segment time in ms (B20000) to prevent buffer under-runs and M20 minimum feedrate // 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/sec] // 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 // M226 P<pin number> S<pin state>- Wait until the specified pin reaches the state required // M240 - Trigger a camera to take a photograph // M250 - Set LCD contrast C<contrast value> (value 0..63) // M280 - set servo position absolute. P: servo index, S: angle or microseconds // M300 - Play beep sound S<frequency Hz> P<duration ms> // M301 - Set PID parameters P I and D // M302 - Allow cold extrudes, or set the minimum extrude S<temperature>. // M303 - PID relay autotune S<temperature> sets the target temperature. (default target temperature = 150C) // M304 - Set bed PID parameters P I and D // 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 parameters 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] // M665 - set delta configurations // M666 - set delta endstop adjustment // M605 - Set dual x-carriage movement mode: S<mode> [ X<duplication x-offset> R<duplication temp offset> ] // M907 - Set digital trimpot motor current using axis codes. // M908 - Control digital trimpot directly. // M350 - Set microstepping mode. // M351 - Toggle MS1 MS2 pins directly.