this post was submitted on 02 Jan 2024
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[Solved: wet filament] Help me identify the problem: wet filament, bad z-height, or clogged nozzle? (lemmy.world)
submitted 8 months ago* (last edited 8 months ago) by PlutoniumAcid@lemmy.world to c/3dprinting@lemmy.world
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This is a Prusa MINI+ that has worked flawlessly for 3 months. Suddenly the prints won't stick to the bed, the first layer is all messy and I cancel the print before anything worse happens.

  • The printer has auto bed leveling so I would rule that out.
  • The plate is cleaned with 70% IPA, so it's not dirty either.
  • I have tried to adjust the "Live Z Adjust" while printing that first layer, but no setting works well.
  • Each filament is printed at recommended temps (+/- 215C) and bed is at 60C.
  • Out of my 5 spools, only 1 works well: RepRapper 3-color PLA. Even the Prusament PLA fails to stick well, and also eSun PLA+, and eSun matte PLA, and Tinmorry TPU.

https://i.imgur.com/MEpK37W.png

Update:

  • Thank you all for your kind input.
  • I washed the plate, and cleaned the nozzle (have no spare nozzle).
  • I also did a fresh Z-test (with this object) using Prusament galaxy silver PLA.
  • That was successful and showed that my height was already very close to perfect.
  • Z-test result shows that -1.425 is best. I was off by only 0.025. Image
  • Started printing an object with eSun matte black PLA but the result was same as in my original photo.
  • Changed back to the Prusament galaxy silver PLA and the result is perfect. (image)

So it looks like my filament storage is not up to snuff! Good thing that I only have a few spools, so not much is lost.

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[–] Imgonnatrythis@sh.itjust.works 0 points 8 months ago (1 children)

And if that doesn't work, use pure acetone (warning, this idea puts knots in peoples panties - frankly it's fine to do if you don't make a habit of it) or try a gluestick (the specialized ones for 3d printing are worth it, don't steal your kids art supplies)

[–] dual_sport_dork@lemmy.world 2 points 8 months ago (2 children)

Use pure acetone only if you know with 100% certainty that it won't eat whatever polymer your build plate is coated with. You don't have to worry if you use a glass build plate, though.

[–] Munkisquisher@lemmy.nz 2 points 8 months ago

It does eat the pei sheets a bit, but that's good to even out tiny marks and dings in the sheet. Like the previous poster said. It's fine to do once in a while to refresh the surface, spring steel sheets are consumables anyway.