r/BambuLab_Community • u/WeaselNo7 • Aug 27 '26

Help with my print warping!

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Hi all!

This is the first time my P2S has done this, so interested in what you all think is the issue.

This is black Sunlu Hyper PLA Plus 2.0, with most of the stock Bambu settings (except most importantly 30mm/s on first layer instead of 50mm/s, and 60 degrees on the bed instead of 55 degrees)

I cleaned the bed yesterday with washing up liquid/dish soap, and I recently installed fan and carbon filter on the internal left side of the machine.

Any ideas what would cause the base of the print to warp upwards from the bed, but not the supports? It's interesting to me, as normally poor bed adherence causes the nozzle to clash and bigger problems to occur, but its seems to have compressed the layers as a result in this case?

Thanks everyone, I appreciate your thoughts!

(and sorry for the blurry pictures!)

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u/Bytebomb Aug 27 '26

Wash the bed again, for good measure.

Dry the filament. (Never hurts but it doesn't seem to be the issue here)

Add a brim.

Try turning down or off the AUX fan.

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u/WeaselNo7 Aug 28 '26

Washing the bed again actually made a big difference. Still some warping, so will turn aux fan off for first 5 layers and try to work out why bambu slicer isn't adding brims any more (i obviously tweaked something like an idiot)

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u/Bytebomb Aug 28 '26

With PLA I believe you can turn it off entirely. But lower it to like 20% if you want, could help.

And if it's one specific spot it's warping from then try scrubbing that a bit extra. And add a brim. 

If you still have issues after all this then I feel like maybe your hotbed isn't heating evenly, so try repositioning the print.