Basics

Any device that "switches" the feed in a single FDM printer nozzle from one to another
Typically does so via cutting and/or heat fusing, then rerouting the filament to the "output" side
Doesn't tend to work well with big temperature jumps, but with colors, and similar temp materials it works well
May allow for some sort of automatic Cleaning Filament use in Print Farms for reliability and reduced downtime?

OTS Options