Comment on The magnetic printing plate shifted early in the print - or something else happened?
teotwaki@lemmy.world 4 days ago
My money is on the PETG starting to loosen and you losing tension on the belts.
You have the MK4 in an enclosure–I did too. At some point I stopped being able to print flexibles, but ASA/PCCF was still fine. Prusa support told me that the idler was getting loose and my hotend was losing grip on the fillament.
I had another print where there was a nearly 2-3cm shift in the layers between layer 5 and layer 80. Some of my belts had absolutely lost the plot. I reprinted everything in ASA or PCCF, and while upgrading to the MK4S rebuilt the printer with all ASA/PCCF parts. No problems since.
ExtremeDullard@lemmy.sdf.org 4 days ago
The idler is gripping the filament just fine. I know that because I have to loosen it when I print really soft TPE and I tighten it back up and readjust the idler pressure when I print PLA or PETG - and I’ve done that a few days ago.
The belts might be getting lose though. I haven’t checked them. They look tight but the printer has a lot of mileage, so I guess it’s worth checkout out. But the re-print I just did of the same bgcode just completed just fine.
FuglyDuck@lemmy.world 4 days ago
This could also be caused by belts being too tight, as they may cause motors to skip steps.
Probably loose belts, but it’s important to not have them too tight. They should be snug, but you should also be able to squeeze and flex the belts without a lot of effort.