Vcore-4 layer shift (new printer)
I just finished commissioning my first RatRig (and first DIY printer). I printed the skew print which worked great, so I started a random test print, and the X/Y seem to have shifted part way through the print. The print was still stuck to the bed, so it wasn't the print that moved. I've not seen this before and I'm not sure how to troubleshoot it. Good news is that the first layer looked pretty good.
Any advice is appreciated as I'm not sure where to start!
5 Replies
Double check pulleys are tightened into a flat on the motor shafts
Thanks! When I built the printer, the pulleys would only fit onto the stepper shafts one way; I couldn't rotate them and make them fit and, once they were seated, they wouldn't rotate either. From memory, at least one grub screw was on a flat surface though (my pulleys have two grub screws). I did check though and they're all tight
next most likely is probably stepper skipping. You have "performance" mode enabled yeah?
Yes, I double-checked that. I actually seem to have solved it, but made the time-old error of changing multiple things at the same time so now I don't know which it was:
- bed temp (first layer) up to 68C
- slowed acceleration down
- set print head speed to 80%
Now I need to undo those one at a time until the issue comes back then I'll know which. If it's the bed heat, then it's adhesion. If it's the speed then it's likely a slipping belt/pulley
good luck!