Here is a good document to get you started with this application. Fundamentals of Motion Control, Please let me know if you have any specific question. Also the ni.com/motion is a very good resource for all the Hardware you will need for such an application.
Thanks and have a great day.
Esmail Hamdan | Applications Engineering | National Instruments
Did you resolve your issue? I am having the same problem right now. I want to controll an Oriell 18550 dual stepper motor but I have no clue. Do you have a manual for your instrument?