Greetings. Until recently I was a proud and happy owner of an A1. Now I’m not a happy owner anymore. Looks like filament is somehow leaking through the nozzle. I didn’t have a print since, mostly because it just drags the print along and destroy it. I’ve tried changing the nozzle into the hardene…

Not leakage. More like lava tubes. The hot filament can cool on the outside and then more and more filament extrudes into the balloon inflating it. A number of things can trigger it. One is filament moisture can cause burps of molten filament instead of smooth extrusion. If the filament curls any …

I’ve tried two different filament types from two different manufacturers, with zero different results. Could it be that something happened to the thing that nozzle is attached to? Calibration didn’t help.

I am having difficulty to see what happened to your build plate. Am I looking at a very thin layer or did it scrape the top surface off?

It scraped the top off it while printing. See picture attached on how it looked originally. [FAP007_600x.webp]

[image] t0ys: I’ve tried two different filament types from two different manufacturers, with zero different results. Could it be that something happened to the thing that nozzle is attached to? While it gets more unlikely that two different filaments from different manufacturers would have th…

I don’t know how bed leveling and homing works on the A1, but I presume it uses the nozzle tip for homing. I have only an H2D and that uses the nozzle tip for homing and for bed leveling. In the Machine start G-code there is an additional -0.02mm Z-offset when a Textured PEI plate is used. I woul…

I’ve submitted a ticket about the destroyed plate, but for time being, I’ve put back the original nozzle after cleaning it up and I’m noticing that the nozzle has a slight wobble when it extrudes. I’ve never seen it work without the cover and the silicone sleeve, but maybe someone can tell me if thi…

This is not normal and almost 100% surely the reason for your destroyed build plate. While homing or probing for bed mesh the nozzle is pushed upwards. Then during printing the nozzle is pushed downward under the pressure from extruding and damaging your build plate.

What do? I’m still waiting on support addressing it.

Filament leakage?

Bambu Lab A Series Troubleshooting

MZip November 17, 2025, 6:59pm 9

I don’t have that printer but other discussions say not normal and loose screws. You want the extruder rigid. That wobble means the extruder isn’t extruding where the printer thinks it is.

Found this thread might have info for you.