Bambu Lab A1 Mini Major Printing Errors

Filament 3D Printer Technical Help Bambu Lab A1/A1 Mini
1

Hi, I have a Bambu Lab A1 Mini that has started giving me terrible prints ever since a large blob formed on the extruder. I was hoping someone here could give me advice on how to fix it.

Here are the current defects I’m observing:
Print Nozzle too close to bed
Over extrusion(?)

I’ve run the same print twice with wet then dry filament and had similar issues both times. I have run the built-in calibration since the issue began but it printed the same before as it does now. The calibration fixing nothing is leading me to believe my hot end might be skewed in some way, but I cant know for sure.

These are some videos capturing the issue:

https://youtu.be/l0SLtO-EaFw?si=uUg2U8Oa0gDCgwOV - Better filament, captures the real issue better

I suspect if I added some sort of command for the printer to move up a couple tenths of a millimeter before beginning the print it would just be fixed, since the extrusion looks nice and smooth to me. Let me know if you can help, thanks!

2

I don’t have an A1 but a P1S. I would suspect the nozzle is work and needs replacement and the bed could be cleaned. Check to be sure the nozzle you are using is the correct in the slicer.

What slicer are you using? It might also be other using the Bambu slicer.

3

I am using Bambu Studio, and the correct nozzle is selected

4

The z offset is internally controlled. I’d replace the whole hot end assembly and see if that solves the issue. Assuming you have cleaned the bed throughly. For deep cleaning I use hot water and laundry detergent with a plastic scraper. Once dry 90 + % ipa