Have to control 13 motors independently and not in master slave modes. Must run through one software solution were they can all be controlled. Motors are Nema 23 steppers. So need to find a control board and drivers. Found one but it was $17,000 USD !!! There must a control system out there that is like the cheap Arduino system but can handle more motors and comes with software and hopefully has an opensource community behind it. So strange that once you go beyond say 4 motors it's like you are talking about building a warp capable spacecraft that has never been done before and why are you doing this etc.