Thank you gentlemen for your responses. I can try to run the motion test recommended on first response but I am unable to do it easily. Location is a good distance away. I understand not being able to test the material unless tangible but I was wishfully thinking it were possible.

I would like to machine aluminum alloys, some mild steel and maybe even some harder steel alloys. The motors are 750 watt DMM Tech ac servos. I am unsure what these are capable of machining combined with the right spindle. I had been reading people having good and bad luck with the China made spindles on ebay but i am looking into something like those only with reliable quality. What general spindle information do I need in order to figure out what material I can machine. i figured 2.2 kw water cooled spindle could machine quiet a range of materials with speed and accuracy beuing the determining factor? Am I wrong with this train of thought?

I need to try and find some ball screws. I have looked into NSK, BSA, NOOK, THK... These all seem to be reputable manufacturers so I thought I would be ok going with one of these depending on price. Do all ball screws for the 3 axese have to be the same pitch? Can I go with a #10 pitch x axis, #6 pitch y axis and #14 pitch z Axis?? I am assuming higher pitch ball screws have better accuracy with diminished torque ratings just an observation. If anyone can help a lending hand on the understanding of ball screw selection? Experience and or knowledge of the topic is greatly appreciated. Or just copy and paste a quick link and I will read it. Gotta run for now be right back...