Trying to improve the finish on flat/top surfaces when printing TPU85. Any suggestions on how to improve the print quailty. I have printed 5 of these and 2 have had these imperfections. Is this an over extrusion?
Increase nozzle and bed temp. for my bed temp >60°C and nozzle 220°C helped a lot.
also the maximum volumetric speed should not exceed 2mm³/s;
for HP-TPU, the maximum volumetric speed should not exceed 3mm³/s
My TPU settings are:
Strength → Infill
Sparse infill density: 6%
Sparse infill pattern: Gyroid
Speed → First layer speed
First Layer: 45 mm/s
First Layer infill: 45 mm/s
Speed → Other layers speed
Outer wall: 60 mm/s
Inner wall: 60 mm/s
Sparse infill: 60 mm/s
INternal Solid infill: 60 mm/s
Top surface: 60 mm/s
Gap infill: 60 mm/s
The key for TPU is slow speed and high temp.
And NO fan!
At least on the transparent version, I find the fan makes it hazy.
I run TPU a little faster, 90-120 mm/s
But I also use a DXC Extruder.
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