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I had built a Turn Table following a design in one of the magazines that had the track power routed through the rail that the Turn Table was supported by and rotated on. The ring of rail was divided into 4 sections. 2 Large sections transfered power while 2 small sections were unpowered to provide an electrical gap to prevent shorting as the electrical pickups on the ends of the table crossed from one large section to the other. <br /> The polarity of the rails was automatic with this design eliminating the need for a reverse switch to control the direction of the locomotive on the table. <br /> A stepper motor sounds like a good way to go. A drive/indexing circuit would need designed as well as a positive reduction free of backlash. Possibly a toothed belt arrangement. <br /> I would be interested to know how to build a stepper motor drive/indexing circuit.
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