BRETT,
I THOUGHT YOU WERE KIDDING,YOUR NOT COOL HARLEY ROD ,I LIKE THE IDEA OF STEPPERS FOR SIMPLICITY,HOW FAST CAN IT GO WITH STEPPERS AND WHAT VOLTAGE IS YOURS.
TUNING THE SERVO DRIVES WAS THE TOUGHEST PART OF MINE,ATLEAST WITH THE RUTEX DRIVES THE PID TUNING THE I INCORPERATES THE FOLLOWING ERROR,SO WHEN MACH SAYS MOVE .100 IT MAY MOVE .097 OR A LITTLE OFF
THE MAKES IT STAY AT .100 UNDER CUTTING LOAD,EXAMPLE IF MACHINE WAS STILL AND YOU TURNED BALLSCREW
THE I WOULD FIGHT YOU BACK OR RETURN IT TO THE X .100