This was answered on another post
Just finished building my machine, everything went well but the steppers won't engage. I re-wired everything, triple checked all settings but no luck. I'm not that well versed in computers so don't know exactly what could be wrong. I'm running on a 64 bit processor with a 32 bit operating system (windows 7). Does anyone know if I have to have the processor 32 bit also? It's the last thing that I can think of that might be my problem.
This was answered on another post
Author of: The CNC Construction Set Books, the KRMx01, KRMx02, KRmc01, and KRmf70 CNC Books, the HANS Electric gear clock book. All available at www.kronosrobotics.com.