About this 3D model

A platform (5cm radius) and a fitting 3-arm-actuator which is connected to a stepper motor with a 5mm coupler and runs on a base made of foamboard. The platform has 3 holes to fix small bearings for smoother moving. Controlled with an Arduino, a stepper motor board and a gear stepper motor with 2048 steps per round. For rotating timelapse videos like this: http://www.youtube.com/watch?v=4jKaOVkcicg