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Mk3s+ fails part way through detailed prints (pawb.social)

submitted 1 year ago by cadekat@pawb.social to c/prusa@lemmy.ml

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Hey !prusa, maybe you can help me. I have a self-assembled Mk3s+ that I put together about a year ago, but never really used because of the following problem.

If I print on draft quality, it makes it through most prints. I've printed a dozen cubes, several brackets, and some other odds and ends.

If I try to print on higher detail settings, however, it behaves very strangely. Most often it'll just hang, and keep oozing out more plastic. Once in a while, the steppers will keep turning and ram the bed or print head against the ends of their tracks.

I've tried updating and downgrading the firmware, different SD cards, etc. to no avail. Support hasn't been much help either.

Any ideas?

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[–] cadekat@pawb.social 1 points 1 year ago (1 children)

I'll try and get a video tonight.

It doesn't ever hit the print area. Sorry I wasn't clear about that. The X or Y stepper will just keep going, and it'll push against the limit of that axis.

I've tried prusaslicer 2.6 and 2.5.2.

The oozing only happens after the print messes up. That stepper just keeps turning with nothing else moving. When it's running, it does a relatively good job of extruding the correct amount of filament. I've only unboxed one spool, but I don't store it very well 🤣 So far I've only tried PLA on the default temperatures.

I can move the bed and print head through the full range of motion without problems using the settings menu. It does get a bit noisy on the z-axis, so maybe something is misaligned there. What's this tool you mentioned?

Honestly, I had given up, but I saw the newsletter for the next version and it inspired me to try again.

Thanks so much!

[–] gifflen@beehaw.org 1 points 1 year ago (1 children)

I have used one like this before. There are others out there as well but the concept should be the same. It would help ensure you are level across both of your lead screws.

https://www.printables.com/model/7467-tool-to-level-x-axis-of-prusa-i3-8mm-rods

Have you put the printer through the xyz axis calibration as part of your troubleshooting?

https://help.prusa3d.com/article/xyz-calibration-mk3-mk3s-mk3s_112351

[–] cadekat@pawb.social 2 points 1 year ago (1 children)

That looks very useful!

I've done all the calibrations several times.

Tonight's print seems to be going uncharacteristically well. Maybe all I need to do to fix my issue is set up a webcam every time I print...

[–] cadekat@pawb.social 1 points 1 year ago (1 children)

Print failed with an error I haven't seen before, about max ambient temperature. Guess I'll pull the board out and give it a look, and try again some other time...

[–] gifflen@beehaw.org 2 points 1 year ago (1 children)

https://help.prusa3d.com/article/ambient-temperature-check-mk3-mk3s_161230 if that triggered something sounds quite wrong. Might be worth going back through support again

[–] cadekat@pawb.social 2 points 1 year ago

Ended up talking to support and they replaced my mainboard. Works great now!