> Hi,
> there are many people that have gone down the same road but,
>
> (1) & (2)
> this guy has various interface H/W
> http://www.edingcnc.com/index.php?taalid=2
> all depends on the S/W you intend to use.
>
> http://pminmo.com/ has lots of standard interfaces.
> the actual choice of driver chip is best targeted to the motors used.
>
> (3) TRINAMIC
> http://tinyurl.com/y8nf2ly
>
> (4) Microchip does have a few application notes for PIC based
> unipolar and bipolar motor controllers.
>
> regards
> Andrew Burchill

Wasn't James Newton providing driver boards suitable for such motors? 
Otherwise ST has a range of chips designed for this purpose.

As to (4), I am not sure if some of the motor drive oriented dsPic chips are 
designed for stepper drive. Check out the selection charts on the web site. 
Remember these chips do have a free C compiler available. 

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