Thanks Hu, you maybe see my lack of clear direction. Although 3200 inches a minute is intriguing, I am thinking in the 350 to 400 ipm range on rapids. So with that in mind a 10:1 or similar timing belt reduction should give a smaller motor but fast motor good torque. The part that I am still unclear of is how much of that 7500 rpm will I practiclly be able to use. If I am shooting for a set ipm rate, what of that 7500 rpm do I really have or do I want? The encoder mounted to the screw makes sense and might make for an easier utilization of some of the motors I have. Mike
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