Quote Originally Posted by M250cnc View Post
To drive a small PCB machine a belt drive like they use on the RepRap machines would do the job better, be easier to implement, would last longer and be far stronger. You also do not need angular contact bearings for the fixed end of the screw either. That is the HD 10mm pitch belts BTW.
Belt would certainly be a lot easier, not to mention faster. The 'Rapman' machine at school was pretty poor to be honest, mainly due to not being put together very well though I think! It only used 5mm belts and the pulleys were laser cut from acrylic.