The boys and I are learning a lot from all of your posts. We would like to build a CNC router and plasma cutter, but are still a bit foggy when it comes to servo controllers. What do we look for when it comes to buying used, commercial equipment?

One vendor says his controllers for brushless servo motors can be used for brushed motors and are good for routers, plasma tables, etc. He has Advanced Motion Controls units, used, and online data sheet has technical infor that we are not too familiar with, as of yet. ( http://www.a-m-c.com/download/b15a.pdf )

Would someone care to advise us on these units? I think that someone familiar with commercial equipment might give some good advice that would carry over to other units often found on the surplus market. Getting comments online would benefit several of us who are getting ready to build.

Please advise ?
thanks
Marc