Hello Everyone!
First of all, I’d like to greet you all! 
I’ve been using my Bambu Lab A1 Mini Combo for a month now, and it’s my first 3D printer. Yesterday, I encountered my first serious issues.
I was trying to print a lithophane decoration on my printer. I designed the project in Maker Lab and set up the print in Bambu Studio with the following settings:
- Layer height: 0.2 mm
- Wall count: 3
- Infill: 15%
- Supports: Auto - Tree
- Brim: Both outer and inner, 20 mm width
Additionally, the lithophane had pre-generated supports from Maker Lab. Printed with White PLA.
My printer has a 0.4 mm standard nozzle and a textured build plate.
The Problem:
The nozzle keeps scraping against the print, causing it to detach from the heated bed. As the print gets taller, I can hear an increasingly loud scraping sound. Since the lithophane is quite thin (3 mm), every nozzle collision causes vibrations and increases the risk of detachment. I’ve printed similar models before without detachment issues, though I did notice some scraping.
I level the bed before every print, and I’ve even performed a full recalibration, but the problem persists.
Does anyone know what could be causing this? Any help would be greatly appreciated! 
Couple thoughts, calibrate the filament to make sure you aren’t over extruding. Lithophanes you don’t want infill. Change it to either 10 walls or 100% infill.
Hi, I have the same problem on my A1 since 2 days I did everything I could think of to fix it, only not edited slicer settings because I had no problems before…
I wanted to make a topic but I can’t find the new topic button 
Hey, thanks for the tips!
So, yesterday I calibrated the filament, and I do a flow calibration every time before starting a print.
I printed the lithophane both with 100% infill and 2 wall outlines, as well as with 15% infill and 5 wall outlines. I also added a raft and set the raft margin to 10 mm.
The print didn’t detach, but scraping still occurred. Should I raise the Z-axis in the G-code?
the solution to stop the dragging during travel.
in printer config, make sure z hop is enabled. i set my hop height to .6
in global settings for the layer height section, infill etc.
go to others > g code output > uncheck reduce retractions during infill. as long as the screws behind the nozzle are tight, this will 100% stop the dragging.
i fought the dragging for 2 months and finally found a thread that had the solution.
there is a bug in orca and bambu studio that skips z hops during travel. it was reported in jan 2024.