The three main axes (x,Y,and Z) and any for that matter, can all be different. their setup is handled by the software. If you are using two screws for one axis (probably the X), you should have a matched set.
Depending on the size of your machine, for instance, your Z axis screw could be a lot smaller than your X axis. Size IS relative to length of travel, mass, forces applied, and a lot more considerations.
Much more could be said, but this is pretty much the very basics. |