If you wanted to make a rotating display box, what would you use to make it spin? A servo? A stepper motor? [ChrisN219] didn’t need his to move quickly by any means, and this opened up his ...

with Bentley saying approximately 70% of buyers tick the Rotating Display box. It’s clever too. There are over 150 components, 40 moving parts and two motors with their own gearboxes ...

The trick lies in a synchronized pair of rotating discs ... driven by a stepper motors and synchronized with a belt or intermediate gear. Another 3D printed mechanical display we’ve seen ...