I was looking at stepper drivers ay diycnc http://www.diycnc.co.uk/html/driver50.html and the kinko http://www.slidesandballscrews.com/2...ml?cPath=44_97

The literature says that the kinco tunes to the motors, whats that all about.
Where the spec says 24 to 70 volts, is the voltage used matched with the motor used?
Anyone used these drivers?