Bambu labs A1 always breaking

gergory117 · April 23

i have spent over 7 months now with a recurringly broken Bambu labs A1, every time i fix or replace parts which by now has been every single part of the print head, it keep having a print failure and then having a glob of plastic form around the nozzle its happened 3 times now, any advice how i stop this happening? every time it has failed with brand new filament opened right before printing.

MineManiack · April 23

Maybe there is something stuck in the path between the spool and the nozzle that is messing it up? You have probably done this, but have you replaced the nozzle/looked for metal fragments in that area?

gergory117 · April 23

1 hour ago, MineManiack said:

Maybe there is something stuck in the path between the spool and the nozzle that is messing it up? You have probably done this, but have you replaced the nozzle/looked for metal fragments in that area?

Hi, thanks for the help, but yea i have replaced nozzles and checked for clogs with cold pulls and the tiny needle thingy while hot.

Thaldor · April 24

Is the glob of plastic the print or just oozed out plastic?

If it's the print (as in the print came off the bed and is then melted around the print head), the fix is often to just redo the bed leveling correctly, see if that helps, do it again, and if it still fails you have something more going on. Depending how much of the printer you have replaced and how much things have moved you may need to perform manual bed tramming.

You might also just have bad bed adhesion (clean that plate, just hot water and your normal dishwashing detergent is the best) or something in the settings that rams the the printhead to the print.

Potatoes2241 · April 25

It would really help if you could post some photos and examples of your failures - there are plenty of general 3d printer failures that produce very similar symptoms.

I own an A1 for around 8 month and it prints almost 24/7, the only recurring issue I had with it is this one, and so far only happened twice to me:

TLDW: Nozzle gets loose due to crappy screws on the hotend loosing tightness, making it sag and screwing with z-offset. Nozzle starts scraping the build plate, the first layer gets all smudged, blobs of plastic start forming on the nozzle and ruining the prints. This is a common issue for all similar extruders (so A1 mini and A1 are affected), even if you get a new one they will do it after a while.

Again, some examples of failures would be grand.