TPU with no stringing, how?  

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BMC3D
(@bmc3d)
New Member

I run a small print shop and I've owned close to 25 printers over the last few years. Various brands and models.

I just picked up a new Mini a few days ago. I'm not new to Prusa or Prusaslicer though, as I have a MK3/MMU setup that's been a real workhorse.

I specialize in printing TPU, and that's where I'm having trouble with this Mini. For the life of me, I can't figure out how to get a clean print. Its either solid, but littered with strings, or underextruded and falling apart. I primarily print Sainsmart TPU, so of course I tried the Prusaslicer-provided profile, but it print waaay too hot and covers the print in strings. I tried adapting my MK3 TPU profile to the Mini, but that turned out no better.

Is it possible to get a clean TPU print with the Mini?

Prusa MK3s + MMU2, Prusa Mini, and bunch of other non-Prusa printers... Printing since 2015...
Posted : 10/02/2021 3:37 pm
BMC3D
(@bmc3d)
New Member

From doing a bit of reading here in the forum (I had previously just searched google) it sounds like I need to order the Bondtech upgrade.

Prusa MK3s + MMU2, Prusa Mini, and bunch of other non-Prusa printers... Printing since 2015...
Posted : 10/02/2021 3:51 pm
BMC3D
(@bmc3d)
New Member

Progress...

I thought I had z-lift disabled, by unchecking it in the filament settings. Then it occurred to me that filament overrides were exactly that, they override the default printer settings. So I checked z-lift and set it to zero. Barely any stringing!

stringing test

Prusa MK3s + MMU2, Prusa Mini, and bunch of other non-Prusa printers... Printing since 2015...
Posted : 10/02/2021 6:08 pm
darrindevine
(@darrindevine)
New Member

Hello,

Are you willing to share the TPU settings you are using for SainSmart TPU

 

Thanks!

Posted : 10/05/2021 11:35 pm
PogoPilot
(@pogopilot)
Active Member

Here's a post that describes my experience with TPU.

https://forum.prusaprinters.org/forum/general-discussion-announcements-and-releases/printing-tpu-problem/#post-385834

Posted : 12/05/2021 11:04 pm
darrindevine
(@darrindevine)
New Member

@pogopilot

Thanks for the advice! I read it and it makes sense. 

Posted : 13/05/2021 2:43 pm
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