Currently printing a model using my Bambu Lab A1, I’ve had this printer for a few months with no issues until now.
During printing I heard a loud vibrating noise, which upon inspection I found that the nozzle is colliding and scraping against the recently printed layer whilst the toolhead is travelling back to its start position.
I am using very small layer height (0.08mm) so I can imagine why this collision is occurring as the change in Z position is much smaller and requires a higher level of accuracy.
Is there an adjustment in the slicer that I need to alter to compensate Z position? Or maybe the printer needs adjustments or maintenance on the Z axis?
As for my reasoning for the 0.08mm, I love a print with those almost invisible layer lines, so if time is not a concern I like to go for those high quality feel prints even if it’s unnecessary. Also I have other objects on the same plate which require higher complexity geometry and quality requirements, but my problem only occurs on this one object I included in the earlier post.
I didn’t notice any major markings on the print after hearing the scraping noise, which made me wonder if the sound were actually coming from elsewhere, but after setting the printer to 50% print speed I could just about see with my eyes that the part was in contact with the nozzle.
I just took a close look but the part seems to be perfectly flush with the build plate and adhered properly. Also the noise seems to be getting louder, almost as if its becoming more out of Z alignment with each layer printed.
Try also to turn off “Others → Reduce Infill Retraction”.
Have the same problem on my A1 mini from day one - on larger prints sometimes it scrapes the infill on travel moves. More often on the smaller layer height.
Running on the bambu slicer software, it was selected on by default to my knowledge, unless i unknowingly selected it whilst messing around with print settings, even then i wouldn’t have saved it like that permanently.
