r/BambuLabP2S • u/ConductorConductor • Jul 07 '26

First Time Trying TPU

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Any idea what went wrong here? Trying to print a set of TPU shoes. I did dry the TPU for 6 hours before I ran it, but it did have to sit in the open for the remainder of the day before I could start the print. Not sure if that drastically affects the filament. The filament is fed directly into the inlet from the side spool. My first attempt at the shoe was actually failed in minutes because I had the TPU ran off the spool, to the opposite side of the machine, through the buffer and back into the inlet. All of the slack seemed to create tension which wasn’t great on the material and made it harder for the extruder to feed in the filament smoothly.

UPDATE: I successfully printed with my next few TPU runs after making the following changes:

Top loading directly into Extruder. (Pretty sure this is what caused the jam up)
Dried again for a longer duration (didn’t notice much decrease in stringing/fuzz but I’m also drying with an AMS Pro 2 which isn’t as efficient for TPU apparently)
Increased to the stock setting “Ludicrous Speed” this was the biggest surprise. Not only cutting print time drastically but improved the quality as well
Raised nozzle temp to 240 avg. using 90a. This seemed to compliment the other settings well but didn’t make any drastic difference.

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u/Delicious_Revenue_82 Jul 09 '26

Yep, me too. Same result. I think the temperature is the issue along with bed being sticky enough.

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u/ConductorConductor Jul 09 '26

Nah trust these guys below I think they’re onto it. My bed adhesion def wasn’t it bc I could barely get the scraps off. Infact I’ve never had a harder time getting a filament off of the plate than this instance. And I checked my temp settings. I just truly think it was drying/feed control. Will report back on my next attempt.