The stepper motor is: HIGH-RESOLUTION ROTATION STAGES of Newport

What type of stages do you have?  Are they the SR50 series?    If so
what type of controller do you have?  I have VI's for the ESP6000
PC-Based High-Performance Motion Controller (From the Newport Website)
that work really well.   But these won't work if you don't have the
same controller.  Do a search on the Newport website for your
controller.  They will have some VIs and utilities for your specific
controller.  Here is the link that will show the compatible
controllers for the SR50 Series
Compact High-Resolution Rotation Stages.

http://www.newport.com/store/xq/ASP/lone.Motion+Control/ltwo.Motorize...

Hope this helps, Good luck!
Greg