Prusa Research

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A Community for discussing all things related to specifically Prusa Researchs 3D Printers like the MK3, MK4, Mini and XL

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Mk4 (nephele.dedyn.io)

submitted 3 months ago* (last edited 3 months ago) by [email protected] to c/[email protected]

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Hello folks! Build a MK4 4 months ago and was very happy with it so far. Now I have bed adhesion problems (see pic attached). 3 weeks ago I had similar problems and after a chat with prusa and resetting the calibration / cleaning the build plate again it worked fine. Now the problem is back despite a clean build plate . After resetting the calibration I got one nice print and then the same problem again. Cold pull of the nozzle resulted in a clean tip and no better results, so I do not think there is any clogging. Also the plate and the should be alright, as I got good results inbetween. Any ideas / hints where my problem is? Link leads to image of the problem. Could not upload the file for some reason...

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[–] TheYang 1 points 3 months ago* (last edited 3 months ago)

Do you watch for that little bit of “ooze” every print?

No (I have an XL with a nozzle wiping mod), but it might make sense to check if the filament/temperature combination produces ooze. Because when I had that Issue I had similar intermittent issues which looked like your image, which I guess is a too high nozzle due to build-up filament on the nozzle during probing, which results in the gaps between the laid down filament, as well as the low bed adhesion.

I would check for a few prints if oozing is the core issue or not, and depending if I want to keep using that filament (e.g. a gifted 200g roll would not be worth the effort in my personal view), I might try and reduce the nozzle Temperature which the printer sets before tapping the bed.