3>1 Filament Manifold - Dual Extrusion / Multi-Material
thingiverse
This is for single-nozzle multi-extruder use. It merges gently and smoothly 3 filaments, cold, into a single, short, bowden tube. From the input end you can use 1-3 extruders, ideally next to each other. In your printing for dual extrusion, add start/end scripts to retract from old extruder, recover from new, by a length of the short bowden tube and into the input tubes. Usually this is something like 45mm. Use a prime tower!
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