@Ryan_Carlyle that’s a bit different because now it requires a “dump bucket” for the filament that comes out during the ram. A possibility might be to make the prime tower have a hole in the middle of it, and the Extruder can spit into that. But now we’re into atypical software implementations into the various slicers.
@Ryan_Carlyle - the whisker jam wasn’t due to a jam of the whisker into the melt zone, but the whisker extended past the Y after the whiskered filament was retracted, preventing the second filament from reaching past the Y and into the extruder.
I don’t think that ‘ram purge’ will help in this case. Just need to work on speed, timing, and movement to prevent the whiskers, or just pulling WAY far past the Y on retraction.
I’m considering making a glass window version of the 2-in-1-out adapter so that I can observe the filament ends in-situ.
@Jason_McMullan look at how Makerware (preferably 2.4) does dualstrusion purge walls, it builds a bucket for purging as part of the wiper wall. Admittedly not a straightforward thing to use with non-Sailfish machines.
My thinking on the ram purge is that it could extrude out the semi-molten zone that draws down to a string as you retract. Maybe. I don’t know.
@Ryan_Carlyle it’s a thought, but a bigger change than what I’m banging around with right now.
I’m playing around with doing a slow retraction to “draw the tip” (like around F100 for 4mm) then retract very quickly to attempt to prevent whiskering.
Running tests now…
Oh, and Cura’s wipe and prime tower does a toolchange, even if there is no dual extrusion on a layer. Annoying.
Cool, just watched the Prometheus review by Tom and was noting the similarities to your design. Very cool nonetheless. If you can reliably get it working then that will be really neat.
