G-Code: Fan Control Commands in Marlin

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Table of Contents

M106 - Set Fan Speed

Usage

M106 [P<index>] [S<speed>] [T<secondary>]

Description

Turns on selected fan and set its speed. By default, if no fan index is given, the nozzle cooling fan is selected.

This command is applied to the next block of commands added to the execution planner. It means that during printing it will take effect after previous moves in the planner are done. So it will be delayed a bit. When printer is in idle under manual control M106 will execute and change the fan speed immediately.

Arguments

Argument Required DescriptionDefault value
P<index> No Fan index0 - Nozzle cooling fan
S<speed> No Speed from 0 (off) to 255 (max)255 - Max speed
T<secondary> No Secondary speed. Added in Marlin 1.1.7. (Requires EXTRA_FAN_SPEED)

Examples

M106; Set fan to full speed
M106 S255; Set fan to full speed
M106 S127; Set fan to half speed
M106 S0; Turn off fan

M107 - Turn Off Fan

M107 [P<index>]

Description

Turns off selected fan. If no fan index is provided, then nozzle cooling fan is switched off.

Options

Argument Required DescriptionDefault value
P<index> No Fan index0 - Nozzle cooling fan

Examples

M107 P0;
M107;
Both examples do the same - turn off nozzle cooling fan.

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