Dear all,
I have very very serious problem here.
My 3d printer needs to stop extruder's fan when I press stop or pause printing.
Anyone have any idea to fix code of Marlin to solve problem.
Thanks very much.

If it is a standard setup the extruder fan is always on when the power is on. It is not controllable.

But lets be sure..

There are normally two fans on the hot end, one is directed at the hot end cooling fins and is normally wired directly to power
The second fan is for part cooling and can be turn on/off etc

Some of the newer controllers do let you control both... depends what controller you have.
You can also hack on a mosfet and add this feature...

What is your electronics setup?
What version of Marlin are you running?


Marlin has some options to control additional fans, but like Dust has already mentioned, not all electronics has the mosfets to be able to take advantage of those optional settings in Marlin.

Edited 1 time(s). Last edit at 10/25/2018 08:22AM by MrAlvin.

Dear MrAlvin, My mainboard is MKS GEN1.4, and my firmware is newest version.
Thanks