I need to design an ultraprecise (accuracy to about .5 mm) XY positioning system for biomedical/lab biology applications. The travel distance for both axes is around 30cm. This is supposed to be a prototype, so " biomedical quality" isn't an issue right now. What is an issue is that I need to know whether i should use screw or belt drive, and if i should use steppers or seros. Is there a way to get a servo to rotate 360 deg but still be able to feed it positioning commands (think lego mindstorms).
Thanks
Thanks