machines/systems/flexibot/docs/marlin/_gcode/M306.md

tag, title, brief, author, requires, group, since, codes, notes, parameters, examples

tag	title	brief	author	requires	group	since	codes	notes	parameters	examples
m0306	Model predictive temperature control	Set MPC values for a hotend.	CRCinAU	MPCTEMP	thermal	2.0.9.4	M306	Requires `MPCTEMP`. View current values with [`M306`](/docs/gcode/M306.html) and no parameters. If `EEPROM_SETTINGS` is enabled, all calibration values are saved with [`M500`](/docs/gcode/M500.html), loaded with [`M501`](/docs/gcode/M501.html), and reset with [`M502`](/docs/gcode/M502.html). Heater Power (P) is related to the heater cartridge in the hotend. Most printers have 30 or 40 watt heaters. `M306 T` will move your hotend to 1mm above the bed for optimal calibration. You should ensure your hotend and print bed are free from debris before running an auto-tune. See [the Marlin MPC documentation](/docs/features/model_predictive_control.html) for more information about MPC parameters.	tag optional description values A true Ambient heat transfer coefficient (no fan). tag type value float tag optional description values C true Heatblock Capacity (joules/kelvin) tag type value float tag optional description values E true Extruder index. If omitted, the command applies to the active extruder. tag type index int tag optional description values F true Ambient heat transfer coefficient (fan on full). tag type value float tag optional description values H true Filament Heat Capacity (joules/kelvin/mm) tag type value float tag optional description values P true Heater power in watts tag type value float tag optional description values R true Sensor responsiveness (= transfer coefficient / heat capacity). tag type value float tag optional description T true Autotune the selected extruder.	pre code Configure MPCTEMP for 40W hotend heater M306 P40 pre code Configure MPCTEMP for 70W hotend heater M306 P70 pre code Perform MPCTEMP auto-tune - after setting heater element power M306 T