Standard TPU (90A–98A) prints at about 225 °C with a 45 °C bed and 30% part cooling. Usable range 210–240 °C nozzle, 25–60 °C bed. No enclosure needed.
MUCH SLOWER — 15–30 mm/s, and this is the single most important setting on this material. Above roughly 30 mm/s the filament buckles in the drive gear instead of feeding, and no other change fixes it.
Bed surface
Clean smooth PEI, no adhesive needed — TPU grips well on its own at 45 °C.
Nozzle
0.4 mm is fine. A larger nozzle helps, since flexible filament resists being forced through a small opening.
What bites people
Speed is the whole game. Above roughly 30 mm/s the filament buckles in the drive gear instead of feeding. Slow down before changing anything else.
Direct drive strongly preferred. On a Bowden setup the tube length acts like a spring and control gets poor — possible, but not where a beginner should start.
Retraction near zero. Long retracts pull molten TPU back and jam the extruder.
Its glass transition is below room temperature, so the published Tg is not the useful number — TPU is limited by softening under load, around 80 °C.