Marble Clock
thingiverse
Balls depart from the upper reservoir to enter the inner part of the cone, where they exit to pass outside the lower cone before completing their course in the lower reservoir. To track ball movement, printing parts with transparent or translucent resin would be interesting. For assembly, tubes made of brass should be prepared with an external diameter of 6mm, internal diameter of 4.5mm, and a length of 38.5mm (six pieces). Three pieces should have a length of 115mm. Three pieces of threaded rod M4, each 205mm long, are required along with six eccentrics M4 and steel balls with diameters less than 5mm.
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