Rolling Ball Sculptures | Marble Machines by Steven Kozari Frank

Marble Machine 8x6x5" No.2

The balls go through rings which are the track spacers. The machine has two flat spirals in one track and a fast track. It’s made from copper, wires are joined with soldering. Natural-looking beech wood base. Electrical components are engraved at the bottom. The speed is adjustable.
Full size with acrylic cover box: 200x160x130 mm. It has 10 mm steel balls.