On Thu, 19 May 2016 03:53:29 -0700 (PDT), wrote:

Actually, high speed is not important. Just the opposite, in
fact.
Vague plan is to use this record turntable as a toy train loco
turntable, so slow speed is good. How quickly the TT will stop
rotating once power is cut, I don't know yet, Assuming not
terribly
quickly, either some form of indexing will be required, or a lot
of
practice!

I think if you want to stop the turntable and drive a loco off
without touching the turntable you'll need some form of indexing.

or physical stops.

Moving ones so turntable can do 360 degrees plus. Hole in edge of
turntable, lighly spring loaded to engaged position solenoid operated
pin that is retracted when the motor is powered.

Next step is to try and find a replacement drive belt, which may
not be
easy.

Many stationery rubber bands last well, some don't. Superglue a few end
to end to get a usable size.

Or see what CPC have...

--
Cheers
Dave.