Mini 5+ Odd fan behavior and now nothing. Blown Out3 and Out4?
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I think I've just blown Out3 and Out4 on my Duet 3 Mini 5+. I had a nozzle clog and I realized it was because the hotend fan was not turning. I tried to test it via the web interface by trying to turn on the hotend fan through the interface. Both fan sliders moved at the same time when I moved one or the other. Well, I thought that was odd. When I moved them, only the part fan came on. My next thought was to swap fans between Out3 and Out4. No difference. Only the part fan came on. Swapped them back and now no fans will come on. Tested the part fan on my power supply and it worked. Tested the hotend fan and it is dead. Could something as simple as a fan dying kill the outputs? If these are both blown, can I hook up the parts fan to another output? I can hook the hotend fan straight to 12v.
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@SpeedyDad said in Mini 5+ Odd fan behavior and now nothing. Blown Out3 and Out4?:
I tried to test it via the web interface by trying to turn on the hotend fan through the interface.
Thermostatic fans cannot be controlled through the web interface they are based on the hotend temperature.
You may not have blow the ports, as you say the other way around the part fan came on.
If you set the ports to normal fan control, not thermostatic, temporarily, and then try a known good fan on each one that will confirm if the ports are working.
See this documentation for more information about thermostatic fans etc:
https://docs.duet3d.com/en/User_manual/Connecting_hardware/Fans_connecting -
When I looked at the web interface, it showed sliders for both the part cooling fan and the hotend fan so that's where the confusion lay. There should not have been a slider for the thermostatically controlled fan. My later testing by connecting the part cooling fan to either of the Out channels and nothing working is what concerns me.
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@SpeedyDad sounds like a config error.
the "Tool Fan" in DWC is the part cooling fan of the currently active tool and not the hotend cooling fan -
@jay_s_uk OK, that explains it. Thanks
As far as the rest go, I feel really stupid now. Out3 and Out4 are fine. Somewhere along the way in testing, I must have confused the two connectors and I was testing with the lead which I believed to be the part fan. It was not. It was the lead going to the disconnected hotend fan. Dumb! I made an assumption and it bit me. That and the misunderstanding about "Tool Fan" led me down the wrong path.
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