I'd like to use geckos in a new controller for cnc mill. My question is what are the determining factors in deciding on what my voltage and aperage should be on my power supply. I'll be using gecko 201's and the motors are rated at 6 amps. I read so many peoples suggestions and now i have another guy telling me i need a power supply that's 58volts and 20 amps. Is he off track? I was always under the assumption that steppers only recieved 2/3 of their rated amperage.

Please help all help appreciated.
Thanks
Mark