Layer shift for just one layer and then back again?

Any idea what could cause a layer shift in X only for one layer, and then go back to normal? VC4-300
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Solution:
I had similar issue at the begining and it was solved by turning on Performence Mode when configuring the printer.
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16 Replies
TheTik
TheTik3w ago
Hotend loose. It hits something and gets knocked to the side, then hits it again and is knocked back
Ferfi
Ferfi3w ago
Would the other walls be that well aligned if that were the case though? This is a stretch but check g code. If that layer or the one directly below is substantially longer then it can cause something like that.
evilC
evilC3w ago
Hotend is fully tight Nothing obvious. I have also seen some layer shifts in other prints too, where it shifted in both X and Y. It seemed to shift back in one axis, but not in another. I am also getting this clicking sound from the two lower rear idler assemblies, not quite sure what is going on there. Some people have suggested bearings may be dodgy
evilC
evilC3w ago
evilC
evilC3w ago
Wondering if it's maybe related to this?
TheTik
TheTik3w ago
Maybe? I don't see any movement in those shafts, but it was a small shift
evilC
evilC3w ago
At one point I thought the clicking was because the grub screws were not against the flat of the shaft - it went away when I fixed that, but it's back now And grub screws are still tight and against flat, so I think it maybe is a knackered bearing
TheTik
TheTik3w ago
it does kinda sound like that yeah
evilC
evilC3w ago
But would that really cause a layer shift?
TheTik
TheTik3w ago
I don't have any experience with a failed bearing. Maybe ask that specifically in general?
evilC
evilC3w ago
Ah, looks like I did not review slicer settings when I imported them into PrusaSlicer. The acceleration values look high?
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evilC
evilC3w ago
Mind you, I guess the print settings are overriding that
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TheTik
TheTik3w ago
Those seem fine
evilC
evilC2w ago
New post started - seeing different thing now (Layer shift is not going back to start). Also think that it's the steppers skipping https://discord.com/channels/582187371529764864/1298979475001970768
Solution
letniq
letniq7d ago
I had similar issue at the begining and it was solved by turning on Performence Mode when configuring the printer.
evilC
evilC4d ago
Yes, that was what turned out to be the issue I was under the impression that one should get things generally working, and then enable it.
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