Magic smoke and stopped working
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i was thinking about the USB port on the computer, it might also be damaged, even if it works now.
odds are the wiring problen is as dc42 suggest, between the duet and the power supply; are all the screw terminals tight? you should consider some sort of crimp terminal or ferrule on the power supply side in any case.
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the usb port on the computer seems to work ok for now. All the terminals are tight, absolutely no give in them. When this happened the printer shouldn't have been drawing much current, no heaters turned on or anything like that but I'm not sure if that makes a difference
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I've taken the board off the printer (nothing connected anymore) and taken the U2 regulator off, there is a short over the outputs where it was connected.
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Suppose you can disconnect the etherned module, but beyond that a current limited supply and seeing what gets hot its not easy to identify which other parts have failed.
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I removed the ethernet module, and the short seems to be gone! So i guess something in the ethernet module has popped, no idea what though
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good news is you can buy just the ethernet module.
but if you're certain the Duet wiring was not to blame I'd be concerned you have a ground fault somewhere in your mains wiring. is your electrical installation fitted with RCD/GFCI's?
Electric water heater or stove tops are the prime suspects for ground faults after outdoor outlets and outdoor lighting.
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I'll do that
Apparently the plug it was plugged into has been a bit dodgy for years, so now I know where the problem is! Do you know which microusb port I should get? Looks like there's a lot of similar but slightly different kinds -
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@logriso said in Magic smoke and stopped working:
Hi at all, I'm a newbie and I follow this chat since the begin.
@hiro_ono, I'm very sorry about your problem... And I hope cause is only the eth module... @bearer, I don't know what does mean RCD GFC -
@bearer coukd you please explain to me? I will prepare the wiring for my 3d printer and I want to be sure to connect everything in the right way, before apply power supply. Thanks a lot
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RCD/GFC are circuit breakers, if something plugged into them draws too much current they open and break the circuit, you can close them again and the circuit should start working. Sort of like a fuse but re usable.
https://www.youtube.com/watch?v=GlM6PE2kKVY&t=9s -
@hiro_ono thank you... But is not enough insert a fuse(s) triggered to the max current of the board?
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Sort of like a fuse but re usable.
OK I understand....
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Have you checked that the VIN terminal block screws are tight, in particular the ground one; and that the wire is tightly gripped by the ferrule?
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@hiro_ono said in Magic smoke and stopped working:
RCD/GFC are circuit breakers, if something plugged into them draws too much current they open and break the circuit,
sort of; but RCD/GFCI are mostly concerned with leakage currents, meaning if the current that goes out on the live wire doesn't match what returns on neutral it will trip at a relatively low current tens of milliamperes; the main purpose is to protect humans against hazardous potentials if something shorts to a metal surface as well as reducing the risk of electrical fires.
(although at least in europe, they are normally combined with a traditional circuit breaker, so you could have 10A circuit breaker with a integral 40mA leake current protection for instance.)
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@hiro_ono said in Magic smoke and stopped working:
Do you know which microusb port I should get?
amp 10103594-0001LF or equivalent.
(but test it before buying a new one, I could only tell the board was discoloured to indicate thats where the current went - and you could also have to repair the ground pad, hard to say before removing the old)
((edit: actually do you need the usb port? for all but firmware recovery i think you could use a usb-ttl adapter and connect to the panel due port instead. i'm not sure i'd bother to repair it if it was broken))
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@hiro_ono said in Magic smoke and stopped working:
I connected my printer (duet ethernet, 12V) for the first time in a while, and couldn't find it on my browser, i plugged in a USB cable (stupidly with the printer still powered on) and there was some magic smoke. the ethernet light isn't on, and when i connect via usb i can't see it. Any help fixing it would be great
Good to know that plugging even the USB cable to a PC will cause magic smoke while powered on. I didn't know it was possible.
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@tekstyle said in Magic smoke and stopped working:
Good to know that plugging even the USB cable to a PC will cause magic smoke while powered on. I didn't know it was possible.
Hopefully this is just a lost-in-translation thing, because it is not a given that plugging in a USB cable will cause magic smoke. It can cause magic smoken given other faulty wiring in either the printer or even external to the printer.
