M Codes

M500 - Stores paramters in EEPROM

M501 - Reads parameters from EEPROM

M502 - Reverts to the default "factory settings".

(M502 does not save the settings to EEPROM, in order to save the factory setting back to EEPROM, M500 has to be called again in order to save the settings to EEPROM)

M503 - Print EEPROM settings

Parameters

axis_steps_per_unit

The unit of movement is in mm.

M Code: M92

Makibox A6 has screws which advance 8mm per 200 steps. 25 steps = 1mm. Makiox A6 standard stepper motors have 1.8 deg/step. However with micro-stepping feature 1/16th step is achieved. Therefore, 1mm movement in x, y, z = (200 / 8) * 16 = 400 micro-steps.

Default value: {400, 400, 400, 163}

max_feedr

Maximum feed rate (movement speed) in mm/sec

M Code: M202

Default value: {60, 60, 20, 45} mm/sec

max_acceleration_units_per_sq_second

Maximum acceleration units per square second

M Code: M201

Default value: {600,600,50,5000} mm/sec^2

move_acceleration

Acceleration in mm/sec^2

M Code: M204

Default value: 1000 mm/sec^2

retract_acceleration

Extruder normal acceleration in mm/sec^2

M Code: M204

Default value: 2000 mm/sec^2

mintravelfeedrate

Minimum travel feed rate (movement speed) in mm/sec

M Code: M205

Default value: 0.0 mm/sec

minimumfeedrate

Minimum feed rate in mm/sec

M Code: M205

Default value: 0.0 mm/sec

max_xy_jerk

Maximum XY jerk in mm/sec

M Code: M205

Default value: 20.0 mm/sec

max_z_jerk

Maximum Z jerk in mm/sec

M Code: M205

Default value: 0.4 mm/sec

max_e_jerk

Maximum E jerk in mm/sec

M Code: M205

Default value: 5.0 mm/sec

Kp

Proportional gain in temperature PID control loop

M Code: M301

Default value: 6000

Ki

Integral gain in temperature PID control loop

M Code: M301

Default value: 30

Kd

Derivative gain in temperature PID control loop

M Code: M301

Default value: 2000

max_x_motor_current

Maximum current for the X motor in mA

M Code: M906

Default value: 1600 mA

max_y_motor_current

Maximum current for the Y motor in mA

M Code: M906

Default value: 1600 mA

max_z_motor_current

Maximum current for the Z motor in mA

M Code: M906

Default value: 1600 mA

max_e_motor_current

Maximum current for the E motor in mA

M Code: M906

Default value: 1600 mA

stepper_sense_resistance

The on-board current sense resistance for motor drive chips. This value is used in calculating the reference voltage from the maximum current values. Only 100 m Ohm or 120 m Ohm is allowed.

Default value: 100 m Ohm

user_max_bed_heater_duty_before_full_pwr

Sets the maximum duty cycle of the hot bed in stage 1 (before 70C)

M Code: M305

Default value: 70%

user_max_bed_heater_duty

Sets the maximum duty cycle of the hot bed in stage 2 (after 70C)

M Code: M305

Default value: 85%

autoprint_enabled

Printing starts automatically when SD card with the file "autoprint.gcode" is inserted

M Code: M31

Default value: 1 (enabled)