Brilliant idea I will definetly bulid this, after the other 10 or so projects. Hope you dont mind but a have a question not related to this Thread.

Im looking to build a stepper driver using an L297 and 2x 6203 and I want to use a PIC to control the holding torque. (by varying Vref) I noticed in the last post that your controller was designed to do this. Would you be able to shed any light on the code to do this and how it was integrated in to the circuit?

Many thanks and sorry again to hijack your thread.