Soft TPU (60A–85A) prints at about 220 °C with a 45 °C bed and 30% part cooling. Usable range 210–235 °C nozzle, 25–60 °C bed. No enclosure needed.
TPU 85ATPU 70ATPU 60ASoft TPUSuper-soft flexible
Starting settings
Nozzle
210–235 °C (start 220)
Bed
25–60 °C (start 45)
Part fan
0–50% (start 30%)
Wall speed
5–20 mm/s
Max volumetric flow
2 mm³/s
Shrinkage
0.8%
Softens at
-40 °C
Enclosure
Not needed
Nozzle size
0.4 mm or larger — 0.6 mm recommended
Nozzle material
Brass is fine
Drying
50 °C for 6 h
Speed
SLOWER AGAIN than 95A — 5–20 mm/s. Softness and speed trade directly against each other: the softer the grade, the sooner the filament compresses in the drive gear instead of advancing.
Bed surface
Clean smooth PEI at 45 °C. Grips hard — let the plate cool fully or you will stretch the part getting it off.
Nozzle
0.6 mm is worth fitting. A softer filament resists being forced through a small opening even more than 95A does, and the wider channel reduces the pressure that makes it buckle.
What bites people
This is not a beginner filament. If you have not printed 95A successfully, start there — the difference in difficulty between the two is larger than between PLA and PETG.
Direct drive is effectively required. A Bowden tube gives the filament room to coil up inside it, and at 85A it will.
A constrained filament path matters more than any setting. Any gap between drive gear and heatbreak is somewhere the filament escapes to.
Print one wall, no infill, for anything meant to flex. Solid soft TPU behaves like a much harder part.