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Melted Heat Bed Thermal Block  

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nathan.e
(@nathan-e)
Eminent Member
Melted Heat Bed Thermal Block

So as I was calibrating my printer after spending any of my spare time I had working on it, I noticed that the heat bed thermal block was melted and I can't seem to get it out of the board. Any tips on what I should do?

Thanks,
Nathan

Posted : 24/02/2016 12:31 am
PJR
 PJR
(@pjr)
Antient Member Moderator
Re: Melted Heat Bed Thermal Block

Hi Nathan

There are many posts about this on the forum and Josef has also commented.

There is very little that you can do about this, as both plug and socket will require replacing which is not an easy task. The best you can do is to cut the heater leads and solder them to the underside of the board.

As to why this has happened, during build, the screws were not sufficiently tightened, the plug was not properly seated in the socket or there was some dirt/dust in the connector, which caused a high-resistance joint, which in turn generates a lot of heat and melts the plastic plug/socket.

In any event, soldering the wires directly to the board removes the two mechanical connection points where high-resistance can occur so it is the best connection method available.

Peter

Please note: I do not have any affiliation with Prusa Research. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage…

Posted : 24/02/2016 10:23 am
nathan.e
(@nathan-e)
Eminent Member
Topic starter answered:
Re: Melted Heat Bed Thermal Block

Hi Peter,

Thanks so much, would there be any benefit to desoldering the melted block off the board or should I just solder the cables straight to the underside without touching the block?

Thanks,
Nathan

Posted : 24/02/2016 4:28 pm
PJR
 PJR
(@pjr)
Antient Member Moderator
Re: Melted Heat Bed Thermal Block

Nathan

I don't think that there would be any benefit from removing the existing connector block; indeed if you attempted to do that, you could end up damaging some of the tracks, resulting in you having to purchase a new RAMBo.

Peter

Please note: I do not have any affiliation with Prusa Research. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage…

Posted : 24/02/2016 4:32 pm
nathan.e
(@nathan-e)
Eminent Member
Topic starter answered:
Re: Melted Heat Bed Thermal Block

Peter,

Thanks, I just wanted to double check before soldering the wires.

Nathan

Posted : 24/02/2016 5:12 pm
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