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The problem with backlash is you can get anal about it PDQ. How much is too much? Removing it 100% means springing the nuts and the axial bearings. You can get it down 20 microns with a shimmed...

C5 / C7 is just the grade of the screw which specifies the lead error. Lower the number the better, so C0 is the best. The common C7 grade screws people get are 0.05mm per 300mm. You don't just add...

Using C5 screws doesn't mean or guarantee zero backlash it's just the quality of the screw and accuracy over a given distance is better.!
Ball Screws are usually measured for accuracy over a set...

Apparently the ethernet version is indeed far superior to USB in that it does not suffer from the grounding issues. However unless you have servos and the speed of the parallel port isn't enough for...