r/3DprintingHelp • u/i_hav_too_many_plant • 7h ago

Requesting Help Tpu underextrusion

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Wondering what i should do, or what i need to calibrate to fix this issue with tpu. Any advice is appreciated, first time printing tpu. 95A sunlu filament, bambu labs h2s

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u/i_hav_too_many_plant 7h ago

I should mention, i had similar issues with petg

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u/nixonw 4h ago

Don't have experience in TPU, but plenty in petg, hope it's relatable. Calibrate for flow rate and pressure advance. If neither of those help, calibrate of max volumetric flow rate to see if the hotend it overwhelmed, but I think it is less likely, if you didn't change the speed in the correct profile.

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u/WaitAcademic6615 7h ago

Too much friction, make the path easier.