The main part of this build is a motor and a ball chain gear – a wheel that captures the balls of a ball chain so that the chain can be pulled. The wheel was designed using Fusion3D and then ...

The blinds in question use a ball chain to open and close ... 17 stepper motor with an appropriate 3D-printed gear to interface with the chain, allowing it to move the blinds accurately.

Ball Chain was the vision of Franz and Val Taubner, the current owners' great-grandfather and grandfather. The company started in a small garage behind the Taubner home in the Bronx, NY.