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Can mere dirt cause heatcreep? (discuss.tchncs.de)
submitted 9 months ago by to c/3dprinting@lemmy.world
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I'm trying to find the reason why my bigger printer suddenly decided to constantly create blockages as high as the PTFE tube in the cooling block (so a little bit above the heatbreak).

It's an older V6 head. The discolouring on the heating block comes from the single time the nozzle came lose and PETG was pressed through the threads upwards, that was a year ago though. I didn't change anything, from one day to another it just decided that (for both PLA and PETG) it'll now stop working properly.

Waiting on a stronger cooling fan (strongest Sunon I could find, the one with 9000rpm). Other than that I'm just confused why this suddenly happens.

Close-up of some dirty parts of a 3D printer's print head. There's the nozzle, the heating block (where the nozzle sits in, fitted with a heating element and a temperature sensor), the heatbreak (a thin metal tube connecting the heating block with a cooling block have a controllable melting point for the plastic) and the circular cooling block. The parts are rather dirty and discoloured.
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[–] 1 point 9 months ago

I would make sure your fan is moving sufficient air. Maybe the bushing is wearing down and it's running slower.

Looks like your heat break unscrews from the heatsink, maybe some fresh thermal paste to help the transfer. Some types can turn into insulators if over heated too much.

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