I've been making progress on the CAD modelling for the project. I've got a draft model of all of the hardware at this point. This weekend I'll start printing/testing components. I decided to go with a double herringbone gear for connecting the yaw...
7/29/2013: As I stated; been working on the cabinet for the Mirror universe project. I bought a couple of "project" Bally Star Treks from a fellow pinball collector out of Shertz a few years ago. These have been setting in storage for a while... and...
Here is the second reduction gear assembly. The motor pinion has 13 teeth and the green nylatron has 72 teeth. This reduction is ~ 5.54. Total 5.54 X 2.88 = 15.9 : 1 .
Follow the line between the teeth, then straight back after the teeth until you get to the shaded area, then try to cut as close to the main skull as possible.