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Prusa Mk4 or Mk4s first layer issues (lemmy.sdf.org)
submitted 2 years ago* (last edited 2 years ago) by to c/3dprinting@lemmy.world
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Is anyone else having HORRIBLE problems with their Prusa Mk4 or Mk4S first layer quality...

My mk4s developed a problem that Prusa spent 3 months troubleshooting with me where the first layer is being laid down too close, and so filament blobs, then prints fail.

Eventually, they advance replaced my whole printer, and the new one had the exact same problem out of the box..

I managed to find a bug that was raised on github for this exact issue, with 22 other people registering "mee too" for the issue..

I'm just looking for some feedback from the wider community to see if any others have hit this problem?

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[–] 1 point 2 years ago (3 children)

this exact issue

Yours looks nothing like the ones on github. Did you try looking at the printer while it’s failing, can you tell if the filament is not extruding or not sticking?

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  • [–] [S] 1 point 2 years ago* (last edited 2 years ago)

    This is one of the worse failure modes I have experienced for this issue. In this instance, the extreme amount of "squish" leads to extreme filament buildup on the nozzle, eventually causing colisions and removing chunks of the FL test.

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  • [–] [S] 1 point 2 years ago* (1 child)

    Thanks..It's a good point. I've updated the post photo, and I'll add the worse failure mode elsewhere.

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  • [–] 1 point 2 years ago

    On the new photo it’s obviously too close to the bed but consistently so. Looks like the defaults picked by prusa might not be the best. Try what they posted on github, manually change the Z offset in start g-code. Looks like (hopefully temporarily) you’re back to manually tweaking your Z height like a plebeian.

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