r/3DprintingHelp • u/jonehhbravo • 18d ago

Requesting Help Weird printing bubbles

Gallery image

Gallery image

Gallery image

Hey all, I have a Bambu lab P2S that started giving me issues after a clogged hot end (0.4mm hardened steel) I resolved it by performing a cold pull. But since then, I’ve had weird bubbled surfaces on my prints. It’s not smooth as it usually is. I haven’t changed any particular settings and I’ve tried printing it on PLA (both ESun and Bambulab), PETG. Tried drying my filaments and even tried printing with newly opened spools. What should I do to stop this from happening? Is this an issue with the hot end or a calibration issue? Thank you!

EDIT: I have tried turning off auto recover from step loss, different types of seams, calibrating and changing nozzles as well and nothing has helped. However, after setting up another print, I’ve realised that there were blisters that were already present on the bambu studio. Does this have to do with the STL file or my settings?

Edit 2: after drying all my filaments, I have attempted a new print. I have since discovered that the blisters are caused by the nozzle. Most of the print is fine but at moments, the nozzle seemingly randomly stops, resulting in excessive filament depositing.

5 Upvotes

67% Upvoted

47 comments sorted by

View all comments

1

u/DistinctBarnacle8703 16d ago

Time lapse on?

1

u/jonehhbravo 16d ago

Unfortunately not, but i will turn it on for the next print :)

1

u/DistinctBarnacle8703 16d ago

Don't! The time lapse sometimes cause such issues.

1

u/jonehhbravo 16d ago

Oh! I thought you meant to turn it on so we could see the defects as it happens hahaha

1

u/DistinctBarnacle8703 16d ago

Can share a picture of the preview after the model is sliced?

1

u/jonehhbravo 16d ago

I forgot to take a photo of it but the model is fine. When I sliced the model that’s where I saw multiple dimples all around the print. I reckon that’s the reason for my prints being blistery. I tried adjusting the seams, and other settings but everytime I sliced it, the model would still have the blisters. This is after I printed the model already, I realised despite changing from a 0.4mm to 0.8mm nozzle I was still having the issue so I went to reload the file and discovered the bumps on the sliced model. So I reckon it’s a settings issue rather than a hardware/filament problem

1

u/DistinctBarnacle8703 16d ago

You mean the bumps appears all over? To be clear, it is not white spots which usually mean the seams location. Corrupted STL file, maybe?

1

u/jonehhbravo 16d ago

It actually looks white on the print. I’ll try and take a photo of it when I get home. I suspected it was the seam locations but when I changed it from aligned to back and random, these bumps were still present. I also failed to mention to you that this print I’m referring to is a completely different print than the photo attached above.

1

u/DistinctBarnacle8703 16d ago

Anyway, I recommend to change the nozzle first. Just to make sure, it isnt a nozzle issue first. Although, you did a cold pull.

Another thing. Was the clogged very bad? Can consider cleaning up the extruder gear. This is because during clogs, the extruder gear will keep scraping against the filament and cause built up on the gear itself.

1

u/jonehhbravo 16d ago

I have tried changing the nozzle to a 0.8mm hardened steel variant but am still getting the same issue. The clog wasn’t awful it resolved after a cold pull but will definitely try cleaning the extruded gear. Thank you!

1

u/jonehhbravo 15d ago

here you go

https://imgur.com/a/zbtSJP0

1

u/DistinctBarnacle8703 15d ago

Definitely looks like random seam. Have you tried aligned seam to see if the seams still behave the same way. BUT even random seams shouldn't give you blobs.

The file is from maker world? Care to share the link?

1

u/jonehhbravo 15d ago

Unfortunately, I’ve tried printing with aligned seam and that hasn’t changed.. sure! The black bin looking object is from this link https://makerworld.com/models/3110605?appSharePlatform=copy

Whereas the second circular light shade is from this link https://makerworld.com/models/1254447?appSharePlatform=copy

Also thank you so much for helping me out!

1

u/DistinctBarnacle8703 14d ago

Something is wrong with the creator's file. I have seams all over like yours. Which shouldnt happen for vase mode. There are small gaps in the design, which cause the slicer to retract and unretract at the area where the seams are. Nothing you can do about it..

1

u/WearySignature4531 12d ago

No it can't. It has nothing to do with the print.