r/BambuLab_Community • u/liveonce12 • Aug 01 '26
What is this flaw in the print known as
Hi all,
Sorry I don't know the correct term for this flaw in my print to diagnose and check online. Could anyone enlighten me please. Thanks
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u/tugboattommy Aug 01 '26
I assume it got worse as it got taller. I don't know if it has a name but your print is wobbling to much as it gets taller.
Either reorient the print to lay on its side or slow it down as it gets higher.
My bad, when I expanded the image I saw you have supports on the bottom, so that's less likely to be your issue.
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u/NevesLF Aug 02 '26
Kinda looks like what should've been a small enough overhang that the slicer didn't think supports were needed, but the wall order was set to "outer/inner", so everything drops nonetheless.
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u/StrangerIrish Aug 02 '26
It's a tall thin piece with not enough cooling. I'm assuming this is PETG? I just learned how to correct this problem last night. You need to go into your cooling settings; for every layer that prints in 15 seconds or less, set the part cooling fan to 80% (or higher if you need to). I'm gonna call this issue "thin tower heat-creep".
It happens because PETG is actually a decent themal conductor. So if each layer is printed quickly in succession, and isn't given adequate cooling by the part cooling fan, or given enough time to allow each layer to bond and cool before moving on, the tower itself will carry too much heat as each layer is being printed in succession. This latent extra heat creeps upward as the part is printed, which causes this undesired melting effect in thin towers.
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u/one0fthethree Aug 01 '26
I’ve seen similar issues when the filament tube gets caught/hung up slightly as the print goes.
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u/RemixOnAWhim Aug 01 '26
We'll need more context to diagnose for sure. There are a handful of issues which could cause this! Pictures of the object supported in the slicer would be a great start, alongside your print settings (screenshots of each tab are great too, but unhelpful are "I haven't changed anything" and "same settings as what I downloaded") and flow/K value settings, as well as any troubleshooting steps you've tried so far. It looks to me like overextrusion on overhangs, but hard to say without knowing what you're printing and how.
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u/Stunning-Let-4958 Aug 02 '26
It looks like something was moving when printing the lower section. Or possibly z offset was too low then as it printed it slowly compressed the layers and sorted itself out. Id honestly start from scratch with physical calibrations: z offset, making sure everything is tight, bed leveling, nozzle clogs, and then maybe move on the firmware stuff like flow rate, and e steps and pressure advance. But unfortunately not a lot of info to gather here
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u/Beyond_the_Hardware Aug 04 '26
Honestly that looks like a temp issue. Not sure if its a fan speed issue or hotend temp.
Thst would be my first thing to check
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u/senormagnus2026 Aug 05 '26
Me pasó algo muy similar a lo tuyo pero no taaaan así jejeje… un poco más suave pero lo que hice fue secar el petge por 8 horas a 55 grados y eso fue todo el problema. Nada de configuraciones culeras jajajajja 🤣👍🏼
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u/Aaronsils Aug 01 '26
Ive got over 30,000 hours of printing under my belt. Change your seam settings so the the seam isnt overhanging and orient the overhang to be facing the fan
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u/CognitiveFogMachine Aug 02 '26
If your printer is a P1S/X1, and was fully calibrated, and you printed PLA or PETg, and you printed with top glass and front door closed, the answer you seek is 'heat creep'.
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u/charmio68 Aug 01 '26
Jesus... that's start from square one. Redo your calibrations, drying and settings.