Well this is called physics... I tested pulleys once in this machine and accidentally invented this scanner... I'm working on a complicated (Cuz I'm a complicator) yet jam-free scanner and a mechanism to move the whole scanner to a degree
A note: The Hour and Minute hand have different motors... That's to make the hour hand more slower... The minute hand is attached to the main pendulum gears while the Hour hand have it's own motor
About the slowen... What part will I slowen? The Minute one or the Hour one?
You can change textures... Textures will help... Just search for pics... then add it (Select Create polygons based on texture if you want)... Then that's it!
(Note: I'ma just suggesting)