When I am printing large panels, I am having some artifacts pop up on some of the surfaces. It is only on the top layer as I watched the print before the top layer started to go down and everything was ok. Left the room and came back a few minutes later and the surface of two of my prints looked as in the picture.
Bambu PLA Basic Cyan
Temperature 225C
Bed temperature 55C
Speed: Sport Mode
I normally print in standard mode and with a nozzle temp of 220 and I don’t have any issues, but I was trying to knock down some time and printing in sport mode shaved off almost an hour of printing.
Nozzle is the hardened steel 0.4 Bambu nozzle that I just installed. Did not seem to have this issue with the 0.4 stainless nozzle.
I have had something similar before, but it was usually a different issue but all related to the speed at which you print. Bed adhesion might have been slightly bad (you did mention it looked fine but it was an issue I did have). ANother issue is the infill getting jagged and when the top layer then gets filled it doesn’t have an even surface to print on. Another option has been too large of a flow rate but that doesn’t seem to be the problem here because the other parts look ok.
So I would place my bet on the infill or start of the first top layer to be jagged and causing issues for the layers that get printed on top of that. Sad news, I have no idea how to fix it other then slowing down or accepting some flaws at the benefit of speed. However I do hope that someone can help you more to get the speed and the quality! I am sure it is possible
Yeah its really weird, a bad part surrounded by good parts. I can only imagine some issues on the first few layers creating this kind of mess that isnt going to resolve by the time it hits that top surface.
The proof of that would be on the bottom of that part, how does it look? If its clean then not really sure what to say. If its not clean then you just had some adhesion issues there, perhaps there was some grease in that area.
Yeah, that’s what I was kind of thinking. However, it is possible that it is bed adhesion issues as I have not cleaned that plate since printing some Pla silk which loves to leave residue.
I’ll give the plate a really good cleaning and see if I can print again at fast speed. I printed the same parts with same 3mf file but at standard speed setting and they printed fine. Same plate and everything. Just 220C and at 100% speed
This very likely could be also. I typically like to print with gyroid infill but this was someone else’s file and I left it at grid. I do recall hearing some noises almost like the nozzle was hitting and scraping each wall as it was laying down the infill. Not sure how to keep it from doing that.
