I have some very uneven lines on one of my walls. See video:
They appear only on one side. I have marked the position with a pink line in the following screenshot.
Here are my settings:
Printer:
Can someone help me with that?
Here are my settings:
Printer:
Can someone help me with that?
I recommend checking the belt tension (see wiki) and following that a full device calibration including filament calibration options (don’t use the textured PEI plate here). Shall help. Cheers!
Thank you @Milosh_Keat . Will do.
In the meantime, i have figured out that there is a dependence bettwen layer time and the thicker lines. It seems, the layer got thicker, when the printer had to print longer on one layer. Any conlusions on that?
sounds like filament calibration being required here. when you touched the belt tension you must do full machine calibration too. let me know when done and how it turned out - there might be an alternative by setting a few options.
Do you mean “Flow Calibration” by “Filament Calibration”?
In bambu studios latest version is a tab called calibration, where you find two different calibration procedures. I’d do both. In case anything mechanical has changed (belt tension), print plate or anything else > full device calibration (can be executed via display or studio).
i have the same problem 
Calibration didn’t change anything. I also see a connection with layer time. In a large print the layer even comes off with a high layer time (>800). see also here (makerworld com models 69357) under comments (under “the newest”) where I uploaded pictures
can someone help?
" Gift Box w/ 120 Screws" on makerworld comments
@Milosh_Keat
I did check the belt tension and I did full device callibration. Unfortunatly it did not work. I have 3 corners which are in good quality and 1 bad corner. To me it seems as I have not enough bed adhesion on that corner. As you can see in the photos, also the top does not look as good as the other corners.
Good corner
Bad corner
Other walls are looking good.
I have printed with Order of inner wall: Outer/inner/infill.
I am trying to add some glue to the PEI plate for better adhesion. And I have turned my piece by 90 degrees. The bad corner is always the same. Let’s see.
I see. What plate are you using? Thanks for sharing.
We can do some kind of troubleshooting if you like, lemme know or PM me. Optional: I can also print your model on my machine to verify the outcome of your model (your decision). 
I am using the Bambu Textured PEI plate. Thanks for the offer. Very kind.
At the moment, i am printing the model (with 90° rotated). I would like to wait for the final print and review. But maybe I would like to come back to your offer.
Sure. I haven’t had any issues with bed adhesion when using the Textured PEI plate. Fingerprints usually ruin prints > wipe it off with cleaning alcohol if not done. Depending on the filament > fan speed adjustments help a little. Fingers crossed! 
Hey, i have rotated my piece by 90° and now it looks good. I also put glue on the plate. So not sure what exactely fixed the issue.
Maybe there is an uneven spot (pink circle). Need to check.
Glue was not needed. I just need to make sure, I print in the middle and not on the outside.