Layer Shifting Issue
Hello, I'm having a layer shifting issue with a large batch print of donut rings:
This is the third time I've gotten the layer shifting like this. Before that, I had a print that was almost successful but there was a layer shift about 3/4 through the print that I couldn't recover from (didn't get a picture of that one, sorry). This printer has perfectly printed other singular, small objects out of PLA, TPU, and PETG before this. So far, I have tried:
- Calibrating XY axis
- Tuning the X belt tension
- Reslicing the file
- Rebuilding both X and Y axis systems
Possibly relevant stats:
- Using Overture PLA
- Firmware version 6.1.3+7898
- Bootloader version 2.3.5
I'm not sure what to do at this point. Below is the exact same code with a different color filament on a different PRUSA MK4 printer that was successful (aside from the few object failures):
Any help would be appreciated!
RE: Layer Shifting Issue
At this point it's hard to provide advice on layer shift issues as there's a bug in the firmware that can create such layer shifts: https://github.com/prusa3d/Prusa-Firmware-Buddy/issues/4487
But 6.1.3 shouldn't display this bug, so I would expect mechanical issue. Looks like you've looked into the usual suspects. One thing you didn't mention was tightening the grub screws on the motor shafts.
What if you print only small number of objects?
Formerly known on this forum as @fuchsr -- https://foxrun3d.com/
There is an inherent problem with slowly rising curves, the geometry combined with thermal contraction can cause the outer overhang to lift into the path of the printhead causing crashes and consequent layer shifts. Usually this begins quite close to the build sheet but with many examples on the bed the now loose prints can dislodge and tilt into the head path again causing further crashes.
Protect the printer from cold drafts and slow down the print. As @foxrun3d suggests, putting fewer prints on the bed would reduce the risk of the first crash.
Cheerio,
RE: Layer Shifting Issue
Thanks for the suggestions! I did tighten the grub screws, forgot to mention that.
And I just finished a successful print - it only had 3 fewer rings on it, but it worked. Some of the rings weren't aligned in the grid pattern strictly either, so I wonder if that might have helped with the printer having to run outside of a pattern? Not sure, but I'm doing another batch with a few less and hopefully they'll keep coming out.