Update.
Well I have put myself to shame (to a degree). I spent a bit of money.
I have now a stepper control system that can be computer controlled (like a CNC machine can)
After many hours of contemplating, pulling apart a dead fax machine for it's steppers, reading IIS for stepper system ideas, countless hours watching youtube on concepts/designs, reading Mel Bartel's Website for ideas, researching and understanding what IC's do, decide what system do I need, designing and redesigning a circuit board for my needs, I thought it was all too much for what is supposed to be a simple system.
So, after many ummm's and arghs, took a venture down to Ocean Controls in Seaford (Melb) and asked what's on offer for my needs.
Figured that a system that closely matched a CNC design is exactly what I need.
So after my efforts, I bought 2 stepper motors (biploar), 2 microstepping drivers (digital ones), 1 parallel port breakout board (to connect the drivers to).
Ok, it cost a small fortune, but after seeing what it can do, I think this best suits my needs of different speeds of tracking stars to all satellites. (original concept).
I'll post up more details soon, with pics, but the drivers blew me away with the beautiful control at slow speeds, with low vibration from the motors.
The standard driver (assuming it's analog??) does not control well (vibration and jerkiness wise) at slow speeds with somewhat of a microstep, motor gets all noisy and vibrates a lot.
OK, so now I have to come up with the goods, so happy
Going to drive my wife nuts, but it's all about me, not her
http://farm4.static.flickr.com/3550/...38b24d01_b.jpg