I have a need for a rotary drive to go in my Wire EDM machine. I have parts that need to be indexed between each burn. I envisioned a stepper or servo motor connected to a timing belt driving the 6 inch lathe chuck submerged in the tank. The timing belt is just to keep the motor out of the water. The mechanics are not a problem just the electronics. I know nothing about drives and motors. My Wire EDM machine has terminals that can signal the rotary controller to tell it to rotate so that is no problem. I don't know if I will need a brake or some kind of lock to keep the chuck from moving or hunting for position while Edm'ing. There is very little force on anything during the EDM process. I also need to be able to change the number of indexes in 360 degrees without too much hassle. The torque to turn the chuck would be about the same as turning a small lathe spindle with your hand. I can put a dwell in the Wire EDM program to give the rotary enough time to do it's job so I wouldn't have to signal back to the machine if that's a problem. Thanks in advance for your help. I just need a direction to go to.