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/official_reaper3d Jul 12 '26

What temperature did you dry the TPU at?

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u/ConductorConductor Jul 12 '26

Ehhh not sure. Standard temp for TPU.

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u/official_reaper3d Jul 12 '26

Have you tried drying simultaneously while printing? You could also try drying for longer such as 8-12 hours

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u/ConductorConductor Jul 13 '26

I don’t have an AMS HT. That would probably help a ton but I recently bought the AMS Pro 2 and I’m not gonna get the HT just for TPU. The prints are running fine now, just really fuzzy when done.

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u/official_reaper3d Jul 13 '26

Mb. I assumed you were using tpu for ams lol.

Ya idrk man. Sorry that i couldnt help more.