The set up in the pic was just a quick experiment really. The end of the threaded rod was held temporarily in place by a strong rubber 'O' ring to the radial arm. There's a pretty long story to all the different setups I've tried on this. The best result I got, was from a 240V microwave turn-table motor, that did 7.55 RMP. I then made a gear-reducer from bronze gears to reduce it to 1 RPM....It tracked beautifully..The only problem being, I was getting vibration from the motor at medium to high magnification, rendering the system useless for astro-photography..I spent hours isolating the motor with rubber mount etc etc. & I got it within reason. I think it would still work, but I think I need to beef the mount up more to create some more 'mass' to dampen out the harmonic vibration..I'm getting closer to achieving the desired results though.
Sorry Mike & co. if this is turning into an 'equipment discussion'
