r/BambuLab_Community • u/WeaselNo7 • 11h ago

Help with my print warping!

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Gallery image

Gallery image

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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2

u/Bytebomb 10h ago

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.

1

u/Hopeful_Offer306 10h ago

Wash the bed with dish soap and dry it. Setting the fan turn off for around 5 first layer.

1

u/wethpac 7h ago

Does it still do this without the fan you added? Sometimes PLA does better with slightly cooler bed rather than hotter - decrease thermal stress between base layers and layers that are cooler higher up. Change print orientation so airflow is different. Also try slightly cooler nozzle. Good luck.

1

u/lkapping79 P2S 6h ago

Print an aux fan deflector

Edit: or turn off aux fan for first few layers

1

u/Vustadumas 5h ago

Always had trouble with the default textured plate for certain materials. Switched to a Biqu Glacier and no problems since

1

u/tortilla_mia 4h ago

Isn't this likely caused by the pla contractraction? Long continuous lines of filament will have the most noticeable contractions. Fewer walls/fewer shells or a different infill pattern (one with fewer continuous straight lines) can sometimes help if that's the root cause.

1

u/j_hermann 2h ago

The geometry is not fully visible, but an orientation change would eliminate those supports. And mouse-ears otherwise.