So the steppers run at 50v and 4.2A. so i will need something that can output 50v at 12.6 Amps. Multiply those to together, so I need over 630 watts/VA? A lot of the transformers I've seen run off 230v instead of 240v,

would this be ok?
http://www.rapidonline.com/Electrica...-0-50v-88-3848

I know hardly anything about electronics,

or could I use one of these http://www.rapidonline.com/Electrica...-0-50v-88-3844 and run the steppers at 4A. :S

Is there a circuit diagram I can base this PSU on?