Sand-Powered Mechanical Hammer is my free interpretation of the mechanical hammer designed by Leonardo da Vinci, rebuilt here as a working paper automaton and given an unusual source of power: falling sand.
Pour sand into the upper hopper and gravity does the rest. As the sand falls, it turns the paddle wheel; the wheel drives the cam, and the cam repeatedly lifts and releases the hammer. The mechanism can also be operated manually with a crank, so the model is effectively two machines in one.
The model is meant to be watched as much as operated: a small kinetic sculpture in which a simple flow of granular material is converted into a visible sequence of rotary and reciprocating motion.
A mechanism you can take apart
Assembly uses paperPino’s RIP Technology: locking paper joints hold the parts together without glue. The mechanism can therefore be assembled, disassembled and rebuilt repeatedly, making its construction and movement easy to explore.
No glue is required. That is part of the model’s character: the structure remains reversible, inspectable and genuinely mechanical.
The mechanism in motion
Seen in motion, the model reveals something that a still image cannot: the timing of the mechanism. Small changes in speed and the slight irregularities produced by the physical movement give the machine its own rhythm. The video is therefore also a record of the model as an object — a working paper construction rather than an idealized mechanical diagram.
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