Week 4 - Gearbox design

In order to drive our new topping dispensers, we need a driving stepper with a matching dog-tooth clutch. However, there's a slight problem, as the motor is too big to place right next to the topping receptacle.

Solution: Use miter gears to transfer power across a 90deg angle, putting the stepper well out of the way. With 3d printing, gears can be very easily manufactured to relatively tight tolerance.