Geneva Mechanism Drives Concentric Vases
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The Geneva Mechanism demonstrates the momentary rotation to the Vase Mode cylinders that slide in and out.
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The Geneva drive or Maltese cross is a mechanism that translates a continuous rotation into intermittent rotation. The classic use of the design was in the movie projector. Each frame is advanced quickly and then retained in that position for a short time. This rendition rotates a pair of Vase Mode printed cylinders that slide in and out.
Thy cylinders have a design clearance (tolerance) of 1.5 mm. The cylinder designs are based on the instructional by Vladimir Murano (@DesktopMakes).
The DC motor is a servo motor that was modified to turn continuously be removing the servo controls and pin-stop.
Amazon parts:
DC servo motor: MG995, about $20 for four pieces
Battery holder: CR2032 battery holder, $6 for 6 pieces
M3 mm bolts: M3 stainless steel button head hex socket head cap bolts, nuts & wrench: $11.
Other:
Scrap wood