Printing soft TPU with original prusa enclosure - User mods - OctoPrint, enclosures, nozzles, ...

RE: Printing soft TPU with original prusa enclosure

pcgeekesq — Mon, 04 Nov 2024 15:44:26 +0000

I did the mod at https://www.printables.com/model/860920-prusa-xl-magnetic-filament-sensor-remix-for-print/files that replaces the springs on the side filament sensors with magnets (and that adds couplers) and it works great with TPU.

I also added couplers to one of my Creality Space Pi dual-spool filament dryer and print TPU directly from it; the setup is shown below.

RE: Printing soft TPU with original prusa enclosure

NelisW — Fri, 30 Aug 2024 05:19:02 +0000

Thanks for the link, will check it out!

RE: Printing soft TPU with original prusa enclosure

carlmmii — Fri, 30 Aug 2024 03:50:16 +0000

Alternate option -- modify the filament sensors so there's no longer any friction.

I've done this modification, for both the side sensors and the extruders, and there is now absolutely no issue pushing TPU through the PTFE tubes. Zero resistance any more from passing the sensors.

RE: Printing soft TPU with original prusa enclosure

BaconFase — Sat, 17 Aug 2024 04:55:06 +0000

Remove that nearby rivet/screw, replace it with a blue festo or maybe just a short run of ptfe tube, and sneak the tpu through there?

RE: Printing soft TPU with original prusa enclosure

Marc — Fri, 16 Aug 2024 09:18:27 +0000

The using something like this to guide the filament
https://www.printables.com/model/733480-prusa-xl-soft-tpu-printing-modification

I used this before I had the enclosure: https://www.printables.com/de/model/718498-prusa-xl-soft-tpu-cable-clip-to-extruder-prusa-xl
It worked well with Polymaker PolyFlex TPU95-HF. Havent' tried any softer TPU.

I'm also interested in a viable solution to feed TPU in the enclosure. 😇
The most simple solution would be to drill a hole. But I can understand, that you don't want to drill in a 600$ enclosure. 😅

RE: Printing soft TPU with original prusa enclosure

NelisW — Fri, 16 Aug 2024 05:59:12 +0000

I feel tempted to put a variation of this drybox on top of the enclosure, feeding down through a coupler in the plastic window (it feels less gross drilling plastic than the steel).

https://www.printables.com/model/870347-drybox-for-prusa-xl-3030-extrusion

The using something like this to guide the filament

https://www.printables.com/model/733480-prusa-xl-soft-tpu-printing-modification

Comments?

RE: Printing soft TPU with original prusa enclosure

mvikman — Thu, 15 Aug 2024 20:41:19 +0000

Dont really know if there's a lot of choices, other that drilling holes.
I'm just going to drill holes on the top for TPU feed, haven't gotten that far yet though, so don't know if I'll make holes on the steel top or on the acrylic sheet.

Printing soft TPU with original prusa enclosure

NelisW — Thu, 15 Aug 2024 15:09:36 +0000

Finished assembling the enclosure last night. It took a bit longer than Robert Cowan reported on YouTube. Now for calibration with new obxidian nozzles.

First job ahead is printing with soft-ish TPU. The challenge is getting the filament to the extruder but not via the PTFE tube.

There are no holes on the top roof to fit a connector/coupler (picture taken from below, inside) , Obviously I don't want to drill holes in my brand new $600 trophy enclosure!

It is possible to remove the top (4 screws & 2 connectors). Ideally, one should not remove the thing for every second print...

Any suggestions?