Smooth flat surfaces with TPU 85?

Bambu Lab H2 Series Bambu Lab H2D
1

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. The last photo is the best print.

TPU Lines 2
TPU Lines 21049×845 221 KB

TPU Lines
TPU Lines1194×764 155 KB

IMG_6082
IMG_60821920×1440 1.01 MB

2

dry your filament.

increase the infill ratio.

feed from TPU inlet using the assist motor and a dry box.

3

I have it in a HT AMS and using the feed assist module. Is the small pitting from it having moisture?

4

yes, it’s from moisture.

dry it again and print the desiccant holders to keep it dry :slight_smile:

5

Any other suggestions. Is this an over extrusion?

6

I recommend that you turn down the movement speed! It worked for me, but if it does not work for you, let me know and I will do what I can.