Next up was figuring out the Z motion. As is seen in my initial sketch, I thought I would create movement in the Z axis by moving the spindle instead of the table. However, I moved away from this concept for a couple reasons. One was that when I decided to make the spindle actually spin, I didn't want to worry about making the motor separate from the spinning bit. Also, real Bridgeport mills move the table itself, and when I decided to make the head rotate making the spindle move became basically impossible. Z axis motion was difficult, since they usually move in dovetail slots like shown below.