Can't turn on the heatsink cooling fan via the command line

[bassamanator 1]

Hi there,

 

I'm able to turn on the part cooling fan via

M106 P0 S255

When I try the same command with P indexes from 1 to 5, the heatsink cooling fan doesn't turn on. The fan is functional because it does turn on automatically when the hotend is heated.

 

Thanks!

 

Edited May 12, 2021 by bassamanator

[GregValiant 1,342]

What printer and firmware is that?

[bassamanator 1]

Anycubic Mega S

I'm using a customized firmware that's based on Marlin 2.0.x.

[GregValiant 1,342]

The author configured the firmware that way.  There is no Gcode command for hot end fan speed.

This is from the configuration.adv.h you linked.

* Extruder cooling fans
	*
	* Extruder auto fans automatically turn on when their extruders'
	* temperatures go above EXTRUDER_AUTO_FAN_TEMPERATURE.
	*
	* Your board's pins file specifies the recommended pins. Override those here
	* or set to -1 to disable completely.
	*
	* Multiple extruders can be assigned to the same pin in which case
	* the fan will turn on when any selected extruder is above the threshold.
	*/
	#define E0_AUTO_FAN_PIN FAN2_PIN
	#define E1_AUTO_FAN_PIN -1
	#define E2_AUTO_FAN_PIN -1
	#define E3_AUTO_FAN_PIN -1
	#define E4_AUTO_FAN_PIN -1
	#define E5_AUTO_FAN_PIN -1
	#define CHAMBER_AUTO_FAN_PIN -1
	#define EXTRUDER_AUTO_FAN_TEMPERATURE 50
	#define EXTRUDER_AUTO_FAN_SPEED 255 // 255 == full speed

[tinkergnome 927]

It is (perhaps) still possible to set the pin state manually with gcode M42 - if you figure out the pin number that refers to "FAN2_PIN"

 

https://marlinfw.org/docs/gcode/M042.html

 

[bassamanator 1]

On 5/13/2021 at 5:38 AM, tinkergnome said:

It is (perhaps) still possible to set the pin state manually with gcode M42 - if you figure out the pin number that refers to "FAN2_PIN"

 

https://marlinfw.org/docs/gcode/M042.html

 

So it still might be possible to do. Will look into it further. Thanks!