Comment on The Prusa Mk4 has done it again ☹️
teotwaki@lemmy.world 4 days ago
It’s the PETG. Specifically, it is the softening on the following parts:
- y-belt-holder-R2
- y-belt-holder-tensioner-R2
- x-end-motor-R2
- x-end-idler-R2
I would recommend the following Y-axis mod for the MK4. I am still running this even on the MK4S, even though the Y-axis was modified on the MK4S.
ExtremeDullard@lemmy.sdf.org 4 days ago
This is the company’s printer. I’ll have to get the expense approved first.
Assuming it needs servicing of course: I have to keep cranking out these adapter plates as fast as possible right now, and something tells me not going so close to the edges of the bed will help. It wouldn’t be the first firmware bug I hit in this printer…
Thanks for the tip!
teotwaki@lemmy.world 4 days ago
Not sure what you need to get approved. Buying a roll of ASA? It’s part of printer maintenance, and making it more reliable in the long run.
And if you don’t have ABS/ASA on hand… why is the printer in an enclosure?
ExtremeDullard@lemmy.sdf.org 4 days ago
My company is flexible, but ultimately this is not my printer and I want to ask permission to undertake maintenance. For all I know, whoever ordered it in the first place is in fact in charge of it, or maybe they want a 3rd party to do it. It’s just a matter of talking to the boss and making sure what I’m about to do is approved 🙂
IceFoxX@lemm.ee 4 days ago
Turn this Off/On or tweak the settings.
ExtremeDullard@lemmy.sdf.org 4 days ago
Before doing any of that, I’ll run several prints of the new parts layout that aren’t quite so close to the edges of the bed. The one currently printing is going well so far.
I really have a strong hunch that it’s just a matter of not using quite as much of the bed surface as PrusaSlicer thinks is usable safely.
Why is that?
morbidcactus@lemmy.ca 4 days ago
Grid infill is crossing, get a decent blob or buildup and you could have nozzle collision, I personally like gyroid but it is slower.
Had a similar failure on the mk3s, what does the belt tension test return? Stealth mode may help or be the cause, anecdotally I’ve seen mention of motor temps, the old rambo board running stock firmware they got toasty when printing in the enclosure in the summer, stealth helped me limp it along until I did a board swap and changed to klipper. I don’t know if this is an issue with the mk4 as that’s not using the older Rambo based boards, but something to consider as well, had it happen even after I did the first abs rebuild.