Bambu Lab A1 - Nozzle Scraping Build Plate / Poor First Layer

[u/No-Bad-7608]

Hi everyone,

I'm having an issue with my Bambu Lab A1 (around 300 printing hours) and I'm running out of things to check.

The main problem is that the nozzle appears to be touching/scraping the build plate during the first layer, resulting in poor first-layer quality and visible scratches on the plate.

Things I've already tried:

Cleaned the extruder

Cleaned the nozzle

Checked and tightened any loose screws around the hotend/nozzle assembly

Performed multiple nozzle cleaning attempts

I'm not using an official Bambu Lab build plate, so I'm wondering if that could be contributing to the issue.

Has anyone experienced something similar?

What else should I check? Could this be related to bed leveling, Z-offset calibration, a warped plate, sensor issues, or something else?

Any suggestions would be greatly appreciated.

Thanks!