Hi,

I don't see any problem in using an AT89c52 as a 3-axis positioner. Since you basically wish to use it to control 3 motors, it should be quite do-able.

In fact you can develop your the uC unit as a generic motor drive module, which provides a standard interface for any other module/ controller/ PC to use. By interface I mean in this case, a simple protocol to accept the speed and direction along each axis from the user, which can be easily used by anyone to use your component. You can even write your own interface software for PCs, that will use your embedded interface, to facilitate control through a PC.

Way I see it, if you make your interface easy enough, you can actually market it as a universal 3-axis controller for Fanuc servo-motors (or even other motor types if you wish to expand) People will want to buy your product rather than invest their own development time and efforts to develop a similar thing on their own. Your module will provide a layer of abstraction over the servomotor control.

(This is the software engineer in me talking now :-)) ...OOAD and reusable components and abstraction and all... )

kundi