I have bumps in the 3D print, mainly at the end of the print, not the first layers, who can help me?
IN most cases when I have had a similar result has been due to a partially blocked nozzle, try a cold pull on the nozzle to see if you can get the burnt filament and dirt out of the nozzle.
[How to perform a cold pull with PLA to clean the nozzle on a Bambu Lab 3D printer]https://www.youtube.com/watch?v=FZd9LfbqSOE
Itâs helpful if you give more details such as the type/brand of filament and the settings you are running it at.
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Looks bubbly to me. I think you may be printing with wet filament. For it to print so many layers âsuccessfullyâ without just completely failing leads me to believe that itâs wet filament over a straight up clog. I suppose it could be a combo, but a clog that causes that type of artifact usually fails before finishing the print.
It is normal bambulab asa filament, I dried the filament yesterday so I donât think that could be the cause. I just print with the default settings of the bambustudio
- clogged nozzel
- (wet filament)
What type of filament is this? If its PLA, I agree with a potential clog issue⌠my guess would be heat creep. Make sure to leave a door open, or at a minimum ramp up the chamber fan. Heat creep would make sense, as the temp goes up from the prolonged print, the heat causes the PLA to partially jam in the extruder causing the extrusion issues.
If Nylon/PA, make sure it stays dry. PA picks up moisture really fast. IMO, that seem too bad for just wet filament, but who knows⌠it could be.
Another possibility, it could be a mixture of problems. Printing too fast for the filament (very likely anyway) as well as a little heat creep causing extrusion issues. A way to tell if you are printing too fast is, mid print you can use the âSilentâ printing mode (50% speed). If it magically gets better, you sliced it with too fast of a speed.
Lots of possibilities.
Edit:
After seeing your update, ASA on the generic ASA profile should be good for speed, and ASA isnât terribly sensitive to moisture (although drying it is a good idea), so Iâm back to a partial clog. Heat creep wouldnât be an issue for ASA, and opening a door wouldnât work. Try the cold pull that others mentioned.
A day may not be enough drying time for ASA. Itâs basically like a sponge with special magnetic power to attract every drop of moisture in the air around it.
To verify, can you print this with PLA or something less hygroscopic. That will help to diagnose.
Bambuâs ASA is nearly identical to their PLA for moisture absorption. Thatâs not a guarantee that the OPâs filament is that good with moisture, but in general, ASA isnât bad.
Bambu ASA Saturated Water Absorption Rate / % (25 °Cďź55% RH) - 0.45%
Bambu PLA Saturated Water Absorption Rate / % (25 °Cďź55% RH) - 0.43%
That said⌠you can never dry too much (with in reason).
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I cleaned the Nozzle and dried the filament for 12 hours, unfortunately not yet the result I would like. Does anyone have any tips?
The asa heat creep is a thing for sure. In fact, I saw it only with asa. I solved it by doing this. Youll most likely find melted filament in the knurled wheels of the extruder. After an asa print, pop your front cover and feel how hot the extruder is. The factory intake hole design is so restrictive that the fan ends up pulling hot air up from the nozzle and bed. (Path of least resistance)
And in the X1C, about 1/4 of the hotend fanâs intake path is covered by the lidar unit which canât be good for flow.
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Letâs try some isolation tactics. Take the same file the you posted here in the last pic and run it with PLA. If it looks super clean you can even stop it early.
Does it have the same issue? The last pic seems like a serious issue. Nothing on that print looks correct. Its even missing tool paths to fill in the faces.
It really just looks like wet filament but he said he dried it.
With pla and pets it prints as it should
is it the smartest thing to saw a piece out of the print head? and if so what is the easiest way to do that? Or is there another way to solve this?
I wouldnât just start hacking things up. The design is fine. If itâs doing the same thing with PETG, PLA, and ASA then there is something seriously wrong. The last pic (the flat object with a hole in the middle of it) looks to have serious extrusion issues.
Letâs start with the basics, make sure the K number in the slicer is set to the default K0.020. Then check the slicerâs âFlow Ratioâ is around 0.98 - 1.00. Then do a quick test print of a 10 or 20mm cube and get the printer extruding correctly before you start wasting more filament.
If it flows good, start your normal printing, if it doesnât re-run the extrusion calibration. Also, make sure the lidar lens is clean, just in case the extrusion calibration is being thrown off by a bad reading.
If after this, there is still a problem, try using the replacement hot-end.
@3D_Farm_Dedemsvaart, is this last picture what you consider fine? It does have serious flaws on the outside layers. It almost looks like you have applied the fuzzy texture and it went all wrong. What material is this last picture also?
I tried to print the block and it seemed just fine. When I tried to print the ring again, it unfortunately went wrong again. I had only adjusted the flow ratio but unfortunately I could not find the k number, where can I find it? and the infill of the print makes a big difference because I have it set to 100%
You can refer to the wiki page:
https://wiki.bambulab.com/en/software/bambu-studio/calibration_flow_rate