Pretty sure I’m having heat creep up the Bowden tube, as it’s getting jammed a few cm back from the hot end and then can’t push the filament any more. When I get it out there’s a little molten bulb at the filament.

In this fail, I think it jammed as usual and the extruder found a way to keep going.

I tried turning down the hot end from 215 to 200 and it’s still failing. My cooling fan is running at 100%.

This is the third time I’ve had this print fail at about this layer, around 1 hour into what will be a 26 hour print.

Any ideas?

  • @HeyLowEnglish
    4•7 months ago

    I have seen something similar to this while printing tpu but never with pla

    I have heard of silk pla filament jamming but this looks like more of a retraction problem to me

    If it’s a jam check to make sure that your nozzle is clear of any debris

    If it’s retraction

    Either too many retractions happening too quickly breaking the fillament at your extruder

    Or

    Retraction distance is too far