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The other ones:
And today evening I will print a case for my recently upgraded trusty old iPod:
Update:
After a few changes the second prototype came out great, files also available for free now on my printables:
How much more difficult is it to print TPU compared to PLA?
I would say that depends on you, your printer and the used filament.
On my Voxelab Aquila out of the box with official slicing Software I could print PLA without issues, but with TPU it would have been impossible. Now I use Astroprint.com for slicing where I control print settings in more detail than it would be possible with Voxelab’s slicer. So that was the first step to take. Also I upgraded my printer to DirectDrive and DualGearExtruder. I then needed a new fan shroud, because the one I used before didn’t fit anymore. Then I had to learn about e-steps, because somehow I went into Unterextrusion (after switching to the dualgear Extruder you need to get the e-steps set new depending on the new extrudergear thickness. Luckily it was mentioned on the package it came in). Then the TPU started wrapping around the extruder gears. Turns out I printed too fast and so on…
Long story short. Depending on your printer, I would suggest at least switching to DirectDrive if your printer doesn’t have it. Also print very slowly, like 20mm/s slowly.