Is "high speed" filament a real thing?

[MalcTheOracle]

I have found a quality issue with TPU HF (it could be all TPU though) when printed using a hardened steel hot-end.

As this might be related to high-speed filament in general, you may wish to take a look.

TPU poor quality issues with hardened vs stainless steal hot-ends

I have noticed a significant quality issue when printing HF TPU, and you have a hardened steel hot end installed. HF TPU using the Bambu TPU 95A HF filament setting: Stainless steel hot-end = great quality Hardened steel hot-end = poor quality The problems include uneven layers, and rough to the touch top surface. Close-up of two TPU straps printed on the same printer, the only difference being the hot-ends. Left = Stainless steel Right = Hardened steel [IMG_3919] I am not necessarily …