Rotatable Bowden Extruder
thingiverse
People are using old hard disk bearings as the base of a Bowden extruder, allowing for smooth rotation when the hot end is in motion. Watchers have been impressed by test videos on YouTube such as MWjJo0KWoKI, aPqOr0JzfH4 and OfmJtAkUp2k demonstrating this innovative setup.
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