I'm working with shortbus on his EDM machine which uses a stepper motor to control the ram. The circuit I have designed could give a maximum step rate of 2500 steps per second. This would only happen continuously as the ram was moving into position but during normal operation 2 or three steps might happen at this rate. The motor will be in micro step 1/10. The big question is can it work for 2 or 3 steps at that rate and what would happen if it can't? Will it still take 1 step or will it go bananas. I can easily change the rate but faster is better.