PWM Fan 1 Output not working

micaheli

In can post my config.g, but it doesn't have that one configured at the moment, but I can tell you I've tried:

M107 P1 ; just to make sure it's off
M106 P1 H-1 ; to disable thermostatic control (read that in that url I posted above)
M106 P1 S255

None of those things made it turn on where it did work on the other two ports.

--Micah

micaheli

config.g

There's my config.g file

micaheli

@T3P3Tony Any thoughts on what my next steps are?

micaheli

I'm really at a loss here. I want to use that output and I was really banking on it working. Does anybody have anything else I can try? Is there a way to test for a bad mosfet? @T3P3Tony ? Filastruder needs an admin here to confirm this to get a replacement sent out.

--Micah

droftarts

@micaheli As @T3P3Tony said, it sounds like a mosfet failure on the fan. If you want to test it, this thread has a good guide for testing the fan mosfet: https://forum.duet3d.com/topic/10027/duet-2-wifi-fan-pwm-0-shorted-dead-fuse-not-blown (thanks @frank26080115 ). You should only attempt to replace the mosfet yourself if you have the necessary skills and experience, because there is a risk that you may damage the PCB or other components, which would void the warranty.

If you would rather a warranty replacement, or guidance about what work you can undertake yourself without invalidating the warranty, contact Filastruder and reference this forum thread. @T3P3Tony and @dc42 have agreed to a warranty replacement.

Ian

pipersw

@micaheli Have you unplug the fan with board powered ? Have you reverse the polarity of fan ?
If you have done one of these step you have blown a mosfet

micaheli

I have tried inverting the output to the fan through the gcode. I verified the fan's functionality and polarity on another PWM output as well as the always on outputs.

As for unplugging with the board powered, I did not do this as I typically don't work on electronics while they are powered. I've learned the hard way when I was young.

elmoret

@droftarts said in PWM Fan 1 Output not working:

@T3P3Tony and @dc42 have agreed to a warranty replacement.

Where did they do this? I do not see such confirmation in this thread.

micaheli

@droftarts Thanks for that! As I mentioned, I'd prefer a warranty replacement for sure. I think @T3P3Tony and @dc42 have to comment on this thread directly for filastruder to honor it.

I have the skills to replace a mosfet, but not the equipment at this time. I also would hate to void my warranty. That's half the reason I buy genuine stuff in the first place. (the other half being that I'm supporting the creator)

micaheli

Filastruder is sending me a new unit. Thanks everybody for your help. I may make a digikey order for those fets now though, just so I have them when my warranty ends. haha.

droftarts

@elmoret said in PWM Fan 1 Output not working:

@droftarts said in PWM Fan 1 Output not working:

@T3P3Tony and @dc42 have agreed to a warranty replacement.

Where did they do this? I do not see such confirmation in this thread.

I have that power! Mwaaaahhaahahaha....

Ian
(Part-time Duet 3D purveyor of tech support / documentation scribe / firmware test mule - but don't tell everyone!)