Hi Mark,
I had a couple of reasons. First, when I purchased the OMC driver and started talking to their support people they sent me a sample program. I've been working off that program and I'm really not sure how to adapt to this two lead (PUL/DIR) system/ code. Secondly I am interested in low rpm applications. I did get the NEMA 17 motor to turn. More on that later. I think my Arduino Board had a bad port. Thanks for your assistance.