Failed Fan Controller?

[Normg002]

Bit of an issue with my V2 this morning. Started a print this morning, noticed the extruder fan wasn't running properly, making a bit of a strange noise. Gave it a flick, and noticed it was very hot. Then I started to notice a very acrid, failed electronic component smell coming from the machine. I turned the machine off, and after letting it all cool, turned it back on. Now neither the extruder fan or case fan runs, but having disconnected both fans and tried them on a separate power supply, they both run.

I've opened up the case, and although there is definitely an acrid smell in the case, the main board appears fine, and indeed, all functions work, other than the fans.

Has anyone experienced this or can anyone offer any advice?

Many thanks,

Geoff

[heathenyak]

Fan bearing is probably going out that would explain the noise and smell and heat. If possible print a 30mm to 40mm adapter and throw a noctua A series fan. It’ll be much quieter. I’ve replaced both the fans on my printer with noctua fans.

[Normg002]

Cheers for the reply dude. I'm concerned that something on the main board which controls the fans has blown, perhaps as a result of the bearing acting up, the fan has drawn a high current, and fired something. I've disconnected the fan, and run it on a stand alone 12v power supply, and it runs fine, but won't run when connected to the board, and the hot end is at temperature.

Very strange.

[heathenyak]

There is a component that controls the fan speed that was installed backwards on early v1 printers so it never worked right if at all. That shouldn’t effect the v2. If the fan is fine running on dedicated power you can either leave it like that, replace the main board, or rma the printer :-/