Thank you all for your suggestions. I will try them out next time I am in my man cave. Limited time at the moment. I will post the results when I have investigated.The attached file contains the arduino sketch I wrote for my dividing head. The math algorithm is written to assure that the 0 (zero) location always winds up at the same point of rotation. As it moves, it recalculates the position from zero so no matter how many times it goes around or back and forth, it maintains positional integrity. The algorithm should work for your rotary table as well.
Thanks once again for your help, best wishes, Colin