RE: CORE One and soft TPU
I can't print Varioshore on Prusa Core One. I printed it without problems on MK3s with maximum volumetric speeds of 4 and 5. On Core One I can't print more than first layer because the filament jams in the extruder. I print without problems PolyFlex™ TPU95-HF with MVS between 5-6 (no nozzle cleaning error)
RE: CORE One and soft TPU
What exactly means "at the end" ? I assume you don't wait for the message "nozzle cleaning error" to appear, isn't it? Thanks!
Exactly, before the error appears.
RE: CORE One and soft TPU
I finally managed it to insert TPU (Forward AM Ultrafuse from Prusa) and print a little bit.
I had to disconnect the PTFE from the extruder and manually feed the filament through the sensor.
For this I have first changed the top cover with this tool - I can really recommend it: https://www.printables.com/model/1226383-prusa-core-one-magnetic-top-cover-with-integrated
But when I print something more than a filament sample, after maybe 20 minutes or so the printer stops and asks for filament change. It then is not able to feed the filament through the whole extruder block. - I think that might also be because of the long way from the (Polymaker) dry box through the PTFE and into the extruder.
My next try will be to let the top cover open and somehow place the dry box that it can direclty feed to the extruder ... maybe that helps ...
RE: CORE One and soft TPU
Yeah i had issues when trying varioshore last night. It was great and painless with my mini. I'll be printing a modded piece in the extruder gear housing that adds a thing piece covering the place where the filament can escape to and jam. Hopefully it works.
I can't print Varioshore on Prusa Core One. I printed it without problems on MK3s with maximum volumetric speeds of 4 and 5. On Core One I can't print more than first layer because the filament jams in the extruder. I print without problems PolyFlex™ TPU95-HF with MVS between 5-6 (no nozzle cleaning error)
RE: CORE One and soft TPU
I changed the nozzle to a 0.4 standard brass and now I can print Varioshore without problems till MVS of 6
RE: CORE One and soft TPU
Totally agree, varioshore is very hard to print. I managed to pass the filament sensor, but was not able to feed the extruder. So I disconnected the tube and inserted the filament manually. And then I got a Nozzle cleaning error but decreased temperature to 200C and the nozzle cleaning passed successfully, then increased the nozzle temperature during point probing to 220C. Placed two object on a sheet and got so many artefact, so more likely will reprint them separately.
RE: CORE One and soft TPU
Same problems as others note here. I'm not really able to print any flexible filaments easily on the CoreONE. I can't even get Fillamentum Flexfill 92A to make it through the filament sensor, no matter how sharp I cut the insertion end. I guess I'll try some of the ideas above to remove the Bowden from the top of the extruder, but it's so difficult to get in there. I'd hate to keep my Mini around just for flexible filaments, but it works flawlessly with them.
RE: CORE One and soft TPU
It’s odd, I managed to pass through both filament sensor my Ninjaflex TPU (85A).
I saw somewhere a solution to that: if you have Sunlu filament connector (that welds 2 pieces of filament), you can weld a piece of PETG on your TPU like a needle to help going through filament sensors.
RE:
Yeah, I just tried Amazon Basics TPU (as the Prusa Slicer has settings for it on the Core One) and that was a disaster.
I was using the brass .4mm HP nozzle that came with the Core One, and then I tried the ObXidian .6mm nozzle...and that clogged immediately too. (The .4mm brass actually worked better...)
I was able to feed the TPU using the XL print head example... not really painful... just didn't work.
I was also using the PP Sheet... which I *think* should work?
RE: CORE One and soft TPU
It worked for me for Varioshore with 0.4 standard brass nozzle
RE: CORE One and soft TPU
Turns out the Amazon Basics 95A TPU doesn't work as it's too soft, or they changed it without noting it on the packaging.
Used the Sain Smart 95A black TPU and it just works.
Even pushes through the sensors.... YMMV. It's possible you'll have to remove the boaden tube on the print head... prints great.
RE:
Has anyone already tried the new Prusament TPU 95A ? - Does it got through both sensors without removing the PTFE ?
RE: CORE One and soft TPU
Has anyone already tried the new Prusament TPU 95A ? - Does it got through both sensors without removing the PTFE ?
I bet it would, I managed to push Ninjaflex (85A) through both of them (after cutting the end to make a nice tip). It was not easy like PLA, but it was feasible.
I saw that someone managed to print Recreus TPU 60A with Bambu printers (P1S if I remember well). As Prusa printers with Nextruder are (in theory) more capable to print flexible material, I hope we will find a way to print such soft TPU.
RE: CORE One and soft TPU
After some research, the main difference between Bambu Lab and Prusa printers is the filament sensor: it's a lever/spring for the first brand, and a ball/magnet/spring for the second one.
This small difference can make printing possible for Bambu to impossible for Prusa because it create way more friction for our orange brand printer than the green one.
While comparing filament sensor differences I noticed that the sensor changes when you want to mount MMU on Prusa printers, from the ball/magnet system to a simple magnet attached to the tension lever.
This change could make inserting soft filament way easier, but I don't know if you can change the filament sensor without using the MMU, and if so, is there any software change to make?
RE: CORE One and soft TPU
Btw, i had issues printing varioshure before on my C1, but after just unscrewing the idler screws a bit, (about 1 twist each) it prints ok with it now.
RE: CORE One and soft TPU
I ordered the NinjaFlex 85A from Printed Solid in the USA. Unfortunately, they shipped and 3mm version of the product and gave me a less than efficient return process (I'm being nice, they basically hosed me, so from now on I only purchase direct from Prusa or other US sources.)
At some point I'll get the proper NinjaFlex 85A or get my hands on Prusa TPU and print some stuff up for you guys to evaluate in pictures.
Honestly, the CORE ONE is just a dream to work with. I just got done epoxying a 13mm steel plate for the Core One to rest on with TPU 95A feet, and it's rock solid.
RE: CORE One and soft TPU
Now it seems to work ...
RE: CORE One and soft TPU
Bahahaahahahaahahaha
That's great. I'm going to remember that when I try the 85A. Wunderbar.
RE: CORE One and soft TPU
After loosening the idler screws and manually feeding the TPU filament from the top—removing the PTFE tube that screws into the print head—I was able to get a good print using Prusa Flex 95A. However, that was with the filament outside the dryer box.
After unloading the filament and attempting to reload it from inside the dryer box, I’ve been unable to feed it through again. Even when manually pushing the filament from the top, it won't go through. I've spent hours trying and it's extremely frustrating.
Does anyone have any suggestions? Can the Core One actually be used for TPU? Seems not.
RE: CORE One and soft TPU
After loosening the idler screws and manually feeding the TPU filament from the top—removing the PTFE tube that screws into the print head—I was able to get a good print using Prusa Flex 95A. However, that was with the filament outside the dryer box.
After unloading the filament and attempting to reload it from inside the dryer box, I’ve been unable to feed it through again. Even when manually pushing the filament from the top, it won't go through. I've spent hours trying and it's extremely frustrating.
Does anyone have any suggestions? Can the Core One actually be used for TPU? Seems not.
I've change the nozzle to a standard brass one. I'm printing Varioshore direct from drybox without removing the PTFE tube