Customizable anti-backlash bowden coupling clip

by hackele Dec 16, 2017
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Did you also print the 2 in to 1 filament chamber shown in the first photo?
If so, care to share more info about your setup like what board you're using, hotend, firmware, resources you used to setup 2-in-1.

Yes, I actually also designed it, see my other things for a few iterations (pictured one is the latest), though the iterations don't actually differ in terms of functionality.

I have a duet wifi board with reprapfirmware 1.19, e3d hotend and two e3d titan extruders. material switching in reprapfirmware is handled by scripts on sd card, but could be done in slicer as well. There are two tricky parts — switching material so that it doesn't leave strings. That needs experiments and depends on you extruder capability, basically I've tried either running off at full speed or going back and forth to pack strings. And making sure sufficient filament is extruded after the switch before returning to print the object. I'm still working out the latest. I have an option of dumping filament into servo-controlled tray, depending on filaments requirements relying on slicer's prime tower and consider writing a g-code postprocessor. I've seen one, but it's windows-only and I don't feel like going to windows for slicing.

So it still requires some tweaking, but fundamentally it works.