Dual extrusion with ninjaflex?

[BenTheRighteous]

I'm trying to print a cell phone case out of ninjaflex semiflex and it's got lots of curves and overhangs, which means lots of support material. Even though this material is flexible, it's still quite a pain to remove.

I've been considering going dual extrusion already, and this seems to be even another nudge in that direction, but I'm wondering - does anyone have experience with dual extrusion and ninjaflex?

My concern would be that the ninjaflex would ooze all over the place, since it compresses in the bowden tube somewhat and the built-up pressure would make stopping the flow difficult when the support nozzle becomes active.

I'm wondering if perhaps the e3d cyclops solves that problem somewhat.

Any thoughts?

[Nylocke]

I can confirm Ninjaflex loves to ooze all over everything. My advice is to drop the inactive extruder temp when switching. I'd put the ninjaflex extruder at something like 100C or maybe 120C. Also set up tool switching G-code to tell it to move somewhere were it won't get snot on the print (thats what it sorta resembles at least...). I probably wouldn't use ABS as the support, it sticks really well. I don't know how well PLA and Ninjaflex stick together, but if Lulzbot was hinting at it and not just saying it, I think it does. You can probably get the PLA to snap or shatter easier than the ABS.