Trying to print TPU

[BobaLives]

I have the A30, all stock with some printed add ons for ease of leveling and z-stability.

I want to print TPU and there has to be a way to do it with a bowden set-up, if the CR-10 can do it, the A30 should be able to. I'm even using Geeetech TPU. The TPU keeps clogging up in the hot end, or throat area, it doesn't bunch or pop out by the feed wheel. I'm using a 0.6mm tip, so not sure if I need to go back to a 0.4mm tip, or increase the temp to 245+ from 235, or decrease my flow rate from 130 to 120 +/-... I have tried other temps and flow rates, but after couple passes during the printing of the skirt it stops flowing and I can see the filament reel not moving. I pull the bowden from the hot end assembly and the filament is curled and I can push my plunger tool down through the hot end assembly and the filament oozes out the tip with a little pressure. not sure why it is curling and not flowing out the hot end. I have been following various guides and CURA profiles from others with bowden setups who have had success with TPU.

Anyone have any luck or tricks to push TPU through the A30??? or do I need a different hot end assembly???

[William]

Hi, About printing TPU supplies
Need to change it to the near end,
I found this: https://www.thingiverse.com/thing:3109217
For the printing precautions of the TPU,
you can refer to this: https://www.simplify3d.com/support/mate ... /flexible/
I hope this can help you.

[BobaLives]

Why doesn't Geeetech sell the direct drive unit to install aftermarket to bolt on/plug in and print? or do they?

[Mrmaint]

I have had luck using the .4mm tip and running 220 nozzle temp. and a 20 speed. Any faster and the tpu gets caught in the gear or the nozzle.

[GiuseppeScollo]

Actually I had first-try success with Tronxy TPU, 30 mm/s speed, .15mm layer height, 230° temp., no retraction and, very important, 100% fan speed. Two tips about how to solve the curlying/clogging problem:

1. no curlying at the gear thanks to this great trick: https://www.youtube.com/watch?v=vwPQuYuEBe0
2. no clogging at the hotend thanks to cooling; I got this from a very detailed guide about printing a TPE material: https://recreus.com/en/how-to-print-with-filaflex/
   but it sounds sensible for TPU as well

Good luck