Orbiting Gear Centre: There is one fixed Pulley, joined to the Base-Part.
The belt path is moves with a rotating Part. The Orbiting Pulleys rotate with a rotating Part around the centre of one fixed Pulley on a rotating Part.
Each Part can be:
|•||Driving Pulley |
The Driving Pulley is kinematically-defined with a motion before you use .
The Driving Pulley rotates to move the Belt.
Linear Motion of Belt = Drive Pulley Radius x Drive Pulley Angular Motion
|•||Driven Pulley |
The DriveN Pulley becomes kinematically-defined by .
The Belt moves to rotate the DriveN Pulley.
Angular Motion of Pulley = Linear Motion of Belt / Pulley Radius.