[smokef]

Thanks Karl for the tip.
Yes, it does have the tool changer. If I loose the functionality of the tool changer in the change to gecko/mach, that's okay. the spindle servo has a different bolt pattern than the x and y, is it different? The old servo driver cards are the same for x,y, and z.
I have no schematic for this mill, but the label on the spindel servo is as follows;

26 lb./in 8.6 A

Max 3700 rpm 140V 47A

Tacho 7 f90-845 IP 44 IC 40

What are the pin-outs on the servo, there are 9?
What is the difference between a resolver and an encoder? Thanks, Brian.