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CORE One and soft TPU  

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Daniel
(@daniel-3)
Eminent Member
RE: CORE One and soft TPU

Hello,

I have printed without problems the shoe uppers with Polyflex TPU 90A Clear. I use a standard nozzle because otherwise it would be impossible to print TPU on my Core One

Posted by: @staldy

My personal experience with flex filament on the Core One:

  • I had a really great experience printing with Prusament TPU 95A!
  • Then I tried Polyflex 90A… what a nightmare !

I dried the filament as much as possible, tested a bunch of settings, and in the end, I just gave up. but I’m still curious if anyone else had luck with this specific filament...

 

Publié : 24/02/2026 8:43 am
1 personnes ont aimé
Staldy
(@staldy)
Estimable Member
RE: CORE One and soft TPU
Posted by: @daniel-3

Hello,

I have printed without problems the shoe uppers with Polyflex TPU 90A Clear. I use a standard nozzle because otherwise it would be impossible to print TPU on my Core One

Thanks Daniel, I will change the nozzle, I tried with a CHT/HF...

Publié : 24/02/2026 9:09 am
Jack
 Jack
(@jack-14)
Active Member
RE: CORE One and soft TPU

I had not considered that HF hardened nozzle would make a difference. That's what I'm using.

Publié : 24/02/2026 9:34 am
Jack
 Jack
(@jack-14)
Active Member
RE: CORE One and soft TPU

Is your printer modified with the improved idler?

Publié : 24/02/2026 9:37 am
GBMaryland
(@gbmaryland)
Estimable Member
RE: CORE One and soft TPU

I am looking forward to INDX because that will allow you to actually print TPU onto other materials while you’re actually doing the print job.

one of the most ironic things was me printing up a coreboxx on an H2D so that the pulley could be printed directly with a soft material on them for the filament spools…

with INDX the path to the intruder will be far better and easier to use than even the AMS 2

Publié : 24/02/2026 10:04 am
1 personnes ont aimé
GBMaryland
(@gbmaryland)
Estimable Member
RE:

This is an example of what I was talking about… and with INDX this will actually be possible. Whereas with my core one, before I sold it because of my complete and utter dissatisfaction with the MMU3 and the horrible support from Prusa, this type of printing was completely impossible.

(and yes, I did attempt to get the military to blow it up… And they were willing to use 100 g of high explosive… But the university was unwilling to risk their high speed camera… I was THAT annoyed with support….)

Ce message a été modifié il y a 2 days par GBMaryland
Publié : 24/02/2026 11:04 am
ssill2
(@ssill2)
Noble Member
RE: CORE One and soft TPU

hahaha, having many hundreds of hours on a MMU2S on MK3, I never ever expected TPU to work in it.  TPU prints fine on the XL and I can do multi color/multi filament things.   PLA works pretty well as a support material for TPU things.  I'll wait to see what experience others have with the INDX before I consider dipping a toe in those waters.  

Publié : 24/02/2026 11:31 am
GBMaryland
(@gbmaryland)
Estimable Member
RE:

no, in my case it was all specifically core one.

 

printing TPU in the core one worked like a dream for me. It was more a matter of the multimateria aspect of things which just was never gonna work. in the case of the MMU3 with the core one it just sucked in general… plus it’s usually limited when it comes to multimaterials that are not TPU (you’re only supposed to use PLA or PETG with the MMU3). I really have high hopes for INDX

Ce message a été modifié il y a 2 days 2 fois par GBMaryland
Publié : 24/02/2026 11:55 am
ssill2
(@ssill2)
Noble Member
RE: CORE One and soft TPU

yes, the MMU was never more than a kludge at best. the 3.x firmware really helped a lot, but at that point I had a 5T XL and never looked back.

Publié : 24/02/2026 12:15 pm
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