Kossel Clear Flexible Extruder

thingiverse

Hi All, I'm excited to share my ugly extruder design with you all. It may not be perfect, but it works like a charm. The idea behind this setup is to hang it on the side of a Kossel clear and attach it to the X-braces for a seamless integration. To make it even better, I printed the middle pieces out of Nylon, hoping it would help the filament slide smoothly through. I'm glad to report that the material seems to be working fine, and I don't see why ABS or PLA would be any better. Although, I'm not sure if Nylon is really making a significant difference in this design. For now, I've got my two extruders connectorized, so I can easily unplug one and plug in the other for manual switching. The good news is that it works perfectly fine for manual switching. Maybe in the future, I'll add some relays to make it auto-switch and add a Y in the bowden tube for even more functionality. You'll need a 606zz bearing with a 17mm outer diameter and 6mm inner diameter. Using this setup, I've successfully printed Benchys using Ninjaflex through a 10-12" bowden tube. The key was to set my print speed to 9mm/s and extruder temperature to 245C for optimal results. However, the hardest part is purging filament prior to printing in Ninjaflex. To make it work, I have to raise the purge with PLA first, then go hot, like 245-ish, and slowly let the Ninjaflex push the PLA out. Once that's done, I get a nice but slow bead of Ninjaflex. Print Settings: Resolution: 0.1 mm layers Notes: Highly suggest at least three perimeters and using 0.1 mm layer heights so the filament hole comes out good.