Unsolved Board caught on fire
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I have zero idea how this has happened as it's been working flawlessly for months up until tonight.
Printer had been off for about a week. Powered on to start a print and INSTANTLY two drivers caught on fire.
Nothing was on the board that would have caused an arc, and I run it using a Pi so settings weren't even loaded in yet. Nothing was upgraded changed swapped etc etc and now I have basically a dead board
Edit: I also verified with a different board that the two steppers that were plugged in had no issues.
Help?
See attached,
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Wow that is quite spectacular failure.
When and where did you purchase the Duet?
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Are you running Klipper by chance?
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Wow, spectacular. Not the sort of thing I'd want to happen to my printer.
Please take this the right way as not trying to cast any shadow on the description here at all only trying to understand would could cause such a major breakdown..
But I would like to ask if you perhaps had heat sinks attached on the driver chips? I see that you have one on the MCU and that usually runs much cooler than the drivers in my experience.
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@nightlonk42 what power supply are you using? The only things I can think of that are likely to blow multiple drivers at the same time in such a spectacular fashion is reversed power supply polarity, or excessive voltage from the PSU.
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@dc42 I asked about Klipper because they have this issue with the duet 3 Mini + in particular https://klipper.discourse.group/t/tmc-drivers-will-be-full-power-when-vin-is-restored/1058
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@phaedrux said in Board caught on fire:
Wow that is quite spectacular failure.
When and where did you purchase the Duet?
Filastruder in July 2021
@oliof said in Board caught on fire:
Are you running Klipper by chance?
No I am not
@gixxerfast said in Board caught on fire:
Wow, spectacular. Not the sort of thing I'd want to happen to my printer.
Please take this the right way as not trying to cast any shadow on the description here at all only trying to understand would could cause such a major breakdown..
But I would like to ask if you perhaps had heat sinks attached on the driver chips? I see that you have one on the MCU and that usually runs much cooler than the drivers in my experience.
I did have heat sinks on the drivers but they were the tall skinny ones and I was very sure there
wasn't any metal or anything on the bottom. They were fully "covered" on the bottom.@dc42 said in Board caught on fire:
@nightlonk42 what power supply are you using? The only things I can think of that are likely to blow multiple drivers at the same time in such a spectacular fashion is reversed power supply polarity, or excessive voltage from the PSU.
I'm using a 24V Meanwell and it's been working fine up until now. I did just check the voltage and I'm actually undervolted by a small amount (23.7). Also double checked the polarity and it's fine. It's been working up until last night perfectly.
I also have a other few devices plugged into the PSU (Buck converter for the Pi4, power to Toolboard) and those are fine as well.
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undefined NightLonk42 marked this topic as a question
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