Hi everyone!
I’m new to 3d printing, recently bought a Bambu Lab A1. My first couple of prints ended up in an excellent quality but recently I ran into a weird issue (at least weird for me) and I couldn’t figure out why it is happening. When the 3D model has an inside top surface, a dislocated layer appears on the outer wall on that layer level. I attached some pictures about my test objects. I created these models in Fusion360 and used Bambu Slicer, double checked, none of them showed any issue with the model, all the surfaces should be smooth. Yet this issue is consistent. What’s even weirder, the honeycomb pattern infilled object shows the same layer problem at the same height what was printed next to the “inside top surface” model even it doesn’t have any closed surface inside.
Any suggestions would be highly appreciated!
It’s not benchy but it’s from the same material forces that give you a benchy hull line
Writeup here The Benchy hull line | Prusa Knowledge Base
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Good read. Definitely the same phenomenon.
I’ve had this as well, to varying degrees with different filaments/prints.
Not a great fix, but slowing down my print time significantly did minimize it. Just a costly workaround, really.
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check the little metal clips for the hotend.
i find over time the little latchy bit can start coming loose. its a 20 dollar part. when mine was starting to go loose it affected print quality. Hotend Heating Assembly - A1 Series | Bambu Lab USA Store
also if you use third-party nozzles/hotends with the replacable, er, tiny nozzle piece – they sometimes don’t mention this but you’re supposed to heat them to 200C and then give them one last tighten when hot to ensure the filament can properly flow because the metal tends to expand. its why official hotends don’t let you swap out the little tip bit thing that I can’t remember the word for.
also even with the real ones that silvery flat bit on the hotend – yknow, the bit where one side is rounded and like a tube and the other side is flat? can “slip” put of position and prevent it from sitting properly flush.
also check your ptfe tubes as over time they can get kinda chewed up or dusty/dirty which would cause friction and prevent filament from feeding into the machine as easily.
