So a little update on the Dual Extrusion Y Splitter I've been working on.

So a little update on the Dual Extrusion Y Splitter I’ve been working on. I’ve spent the last few days trying to pin everything down with it. I’'ve updated it a little and tightened up the filament path to just a hair under 2mm, (Can’t say exactly how much due to filament shrinkage and printer tolerance, it’s about 1.9-1.95 though). YMMV with the model on Thingyverse (see my previous post as it’s all down to how tight your printer tolerances are. I’ve tried it with various PETGs/Copolymers (HDGlass, Extrudr PETG, Colofabb XT & NGEN) and they work without an issue, the crux is this though, PLA will jam and quite possibly block your Splitter. Permanently. Not too much of an issue for me as 99% of what I print is PETG or Copolymers.

Tool Change Scripts are almost there, I’m still getting a little over what it should be to get the filament back into the nozzle in the best place and not get any filament being pushed out and I need to work out how to force retract between the purge tower and model to kill strings, also I need to make the tower wider to kill color bleed. With all that being said. Have a video of it in action on the new FB2020 - Harlequin (More on that when it’s joined the farm).

Very nice. What size is your purge tower in the video?

15mm, this print failed shortly after due to a loose extruder gear on T1, I need a new gear as it’s not staying tight. I’m running another now, hoping it stays put with a 20mm tower and ooze shield.

Thanks for your feedback, i made lot of tries with this system and always failing ! I know now PLA can be the cause of jaming… I was looking to the play between the heatbreak and the PTFE tube to solve this.
Thanks !

@Cubex_Upgrades Not a problem, PETG is by no means perfect either, but it works a lot better. The Tighter bore bearing grade PEEK tube is really needed to get perfect results. (I’ll be getting a few machined soon)

When I was playing with this, I hacked CuraEngine to skip the infill on the purge tower when not switching colors.

Really saves a lot of filament, and so long as the walls of the purge tower print, the 100% infill purge will be dumped “into” the tower.

@Jason_McMullan - I use S3D, it’s a good idea, but I don’t think it’s something that can be done with S3D