Layer shifts on pre assembled core one?
I recently bought the core one (pre assembled) as my first 3d printer. The first few small prints came out good however now I keep getting “layer shifts” I think from what I’ve read it’s something to do with the belts and squaring the machine improperly but I don’t know what to do to fix this! If anyone knows what to do to fix this please let me know.
(photos are of a benchy made from the prusament pla supplyed with printer) 
RE: Layer shifts on pre assembled core one?
Usually these layer shifts are caused by 4 or more things
- Print bed is not clean. Oils from your hands (or other things) cause the print to temporarily detach from the print bed, shift slightly then reattach itself. That can be mitigated in most cases with IPA and if that doesn't work, unscented dish detergent and warm water.
- Nozzle and heatblock is not properly seated in the heatsink. Either the nozzle is not fully inserted or the thumb screws the hold it in the heat sink are not tight and the nozzle slips down slightly. This can cause it to colide with the print and creates a layer shift
- Belts are too loose. Can cause the print head to lose it's position and start causing a layer shift
- The print head umbical cable and PTFE tube are sagging and get wedged between the print head and the rear X motor. This can cause the print head to skip and lose it's initial position.
I would first start by running the Manual Belt Tuning wizard. On the screen, go to Settings -> Manual Belt Tuning and follow the prompts.
RE: Layer shifts on pre assembled core one?
Thank you very much for the information. I will check those things and report back!
RE: Layer shifts on pre assembled core one?
One more thing to add. Make sure your nozzle tip is clean. Use a brass wire brush to clean it. Filament crud stuck to the nozzle could possibly cause bed levelling issues which would result in first layer adhesion problems.