Nozzle is scraping against model + pooping

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  • Detailed description of the problem

My still very new A1 printer has started scraping the nozzle against the model when printing. It also leaves a lot more random “poops” when extruding making for sometimes very unclean and uneven surfaces.

  • Printer model used

Bambulab A1

  • Slicer settings used

Orcaslicer - Restored all to default.

  • Type of filament used

Bambulab PLA Matte Black

  • Photos that clearly show the problem

  • .3mf file (if the file can be shared)

I just used the retraction calibration test in Orcaslicer.

  • Any potentially useful information that is related to the problem

Using a smooth PEI plate, but it also happens with the included textured plate. I thought that some of the unevness while printing may have been caused by moisture buildup in the fillament, but I have now bought a PolyDrier and dried the fillament for a total of 18 hours.
I have the same issue using my 0.2mm nozzle.

Tried doing calibration on the printer several times. Also tried some of the calibration tests in Orcaslicer.

Not sure what to try now.
I can see that a lot of people have similar issues, maybe not both at the same time, but a lot of times these topics remain unresolved or people are just not good at replying with what actually worked for them.

This printer has been used for maybe 50 hours total, so I would be shocked if something has broke already.

I deleted all configuration files for Orcaslicer to try with all settings at default. Is anything stored on the printer itself that I need to reset it too?

Tried a reset of the printer itself too. It still scrapes against the top model and the surface is still very uneven.

Left one is with my old customised settings (slow speed), middle is with orca restored to defaults, and right is with the printer restored to default too (did not bother finishing that one).

Any help would be greatly appreciated. It seems like something has been knocked out of place, though you would think that the auto bed level calibration would solve this?

I came across this topic which had good suggestions on how to potentially fix these issues.

Avoid crossing walls: On
Reduce Infill Retraction: Off

However for some reason this produced even worse results (ignore then bend in the model).

bonjour,
je ne suis pas un expert mais avez vous fais une calibration de debit dans bambu studio, car on dirait une sur-extrusion.

I have the same issue periodically, but mine stops as soon as I run calibration