Lazy Susan Power

[George C]

In Lunacy, we used one of these lazy susan bearings http://www.leevalley.com/en/wood/pag...50,43298,43316 which are much better quality. We had to make some modifications to it and it did come on the way back to the pit after our first practice match when our bot fell off the wagon. We were able to find most of the ball bearings and put it back together. There's a removable threaded plus which is used to put the balls in. Lesson learned - no running. It supported the weight of our tower, and tiltable 4 wheel shooter. It worked well until late last year when the race finally cracked. We cut a Gates belt apart and epoxied pop-riveted it to the circumference of the lazy susan and then used a window motor to drive it.

http://www.othsrobotics.ca/images/fred.png

[Kevin Thorp]

I like the machined lazy susan bearing, as opposed to the cheap stamped ones.

You could use a timing belt for the drive mechanism. With a small drive sprocket and large turret sprocket you would have a dramatic speed reduction & torque increase.

For very large sprockets you don't need teeth completely around the perimeter. Any more than 6 teeth engagement at a time is redundant. Just make sure the sections that don't have teeth have the same radius as the bottom point of the tooth.

Example (of course you would have a hollow hub):