#New to TPU, advice?

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ivory delta
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I recently got a free roll of transparent green TPU. (The spool had been dropped and split in half, so I got it for free with the caveat that I had to untangle and re-spool it.)

I've never printed with TPU before so I wanted some advice. It's a 95A shore hardness. Any advice regarding build surface (smooth or textured?) speeds, accelerations, PA or no, retraction, etc, is welcomed. I do have a filament dryer I can print it directly out of, so that's covered. Printer has a short path direct drive that should be able to handle it. Typical PLA retraction is 0.5mm, for reference.

sharp path
# ivory delta I recently got a free roll of transparent green TPU. (The spool had been dropped...

Should start with standard TPU profile and see if that can crank out a benchy. Should be super slow.

Most important thing I learned really quick failing only 2 prints in TPU (the rest literally come out perfect after).

REMOVE ALL RESTRICTION in your filament path.

Basically if you have a direct drive, take all the tube off. Find a way to hang your TPU right on top. Preferably with a really smooth sets of ball bearing. I use a set of ceramic bearing.

2nd. Only one build surface that I can take my TPU off without damaging is the Biqu cryogrip pro (NOT THE COLD PLATE, DARKER BLUE that only for PLA and PETG). Otherwise, use gluestick or whatever you prefer to be able to take them off the plate. TPU sticks so well you need to plan that out. Or you'll be out of a build plate. Especially smooth plate.

PA yes, just do the test. Retraction, surpringly yes, do the test, do between 0-2mm. If you have a fast moving printer (print should be slow but that later) and actually can dry the TPU properly, 95A actually barely need any retraction. I can do 0 on my printer if I only run like an hour print (after that it get wet since I don't run it from the dryer/box). Do not print from the box. The tube will absolutely get in your way unless your gears are extremely good.

Fan speed should be cranked to max to near max. TPU need it.

If you have Direct Drive and dry filament.

Do this funny thing. Run your temp tower with a about 1mm retraction just to check your temp. Make sure fan is correct.

Adjust your flow by guessing if need more or less (else you gonna take forever for the flow test to finish at this point).

Now run a max volumetric test. 3-20 sounds good.

You'll surprised if your TPU can do at a speed that's not 3-5mm³/s like slicer default is.

I run mine at 12-15mm³/s.