Heatbed cable cover melted down
Hello, recently I've had an issue with heatbed cable cover melting down. Printer failed with thermal runaway so I've tried to disassembly the part and it seems that the cable was damaged by the meltdown and lost some isolation as it fused with the cover. I'm not electrician but it seems that plastic getting into cable is not a good thing.
I think just replacing that cable and covers will fix it, but as you can see on the photos, heatbed connectors look very messy due to all the burnt plastic. Has anyone had anything similar happen to them? Do you think I will also need to replace heatbed?
Printer self assembled model 3, later upgraded to s.
Best Answer by JoanTabb:
Your heatbed power connections were assembled incorrectly.
the loop terminals should have been above the heatbed.
you would be best cleaning up the heatbed connections, replacing the wires and connectors printing a new connector cover set, and replacing that too
regards Joan.
RE: Heatbed cable cover melted down
Your heatbed power connections were assembled incorrectly.
the loop terminals should have been above the heatbed.
you would be best cleaning up the heatbed connections, replacing the wires and connectors printing a new connector cover set, and replacing that too
regards Joan.
I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK
RE: Heatbed cable cover melted down
Follow up for anyone who ends up with the same mistake as me:
Replacing cable was not enough, printer was still failing selfcheck when testing hotbed. After replacing hotbed it works again.
RE: Heatbed cable cover melted down
That was very unfortunate!
regards Joan
I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK
RE:
"Funny", because if you look up the Mini build manual, it said (and pictured) to install the cables like in the OP.
Your heatbed power connections were assembled incorrectly.
the loop terminals should have been above the heatbed.
you would be best cleaning up the heatbed connections, replacing the wires and connectors printing a new connector cover set, and replacing that tooregards Joan.
RE: Heatbed cable cover melted down
Maybe the. Mini heat bed is constructed differently.
It is certainly lower power rating.
Regards Joan
I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK
RE: Heatbed cable cover melted down
Maybe. But if, why the meltdown? My friends Mini melted too, but the srcews and the cables installed properly.
RE: Heatbed cable cover melted down
A small side note to this, it is also important that the power cables is firmly screwed in to the bed.
If they can move, even a bit then that will create heat that may melt the cover and other strange issues.
I ran in to this myself early on after assembling the printer, could also have been after replacing the cover with an angled one to prevent cable from bumping in to the rear of my enclosure.
RE: Heatbed cable cover melted down
Of course. Whenever something like this happens, you will find at least one nilock nut has gotten loose.
The matter is, why did it come loose?
It shouldn't, if it was tightened in the first place.
RE: Heatbed cable cover melted down
Coming from an aviation background I would never use a nyloc nut in a heated application. All metal lock nuts are made for this that won’t lose their locking ability when they get hot.