I am machining parts for a G0704 CNC conversion. My mill never came with a milling head so I have made a mount for a BT30 ATC spindle with air cylinder on top. I need to find a spindle motor to run the machine. I like the 1.8KW DMM Servo. That Motor has a 3000rpm max speed. My spindle can take 7000rpm. I know I can gear up the speed. How then do I get the spindle to stop at the same spot so as to use the ATC. I want the BT30 dogs to be in the right place to fit into the head (like the MX1100 Tormach. Is there a way to program this in Mach3 (Mach4 if need be) or the DMM software or do I have to put on a spindle encoder or what other choices exist.