Let's start this section off by making a simple FAQ. The basics of motion transmission seem elusive to the new user, and it's so important to building a CNC machine!

So what were our questions, when we started out? These are the ones that I remember...

1) How do I make this thing move?
2) Screw drive
3) Rack and pinion
4) There are different kinds of screw threads? Allthread, ACME, and ballscrews.
5) Motor couplers
6) Backlash
7) How to deal with backlash
8) Bearings, radial, thrust, etc.
9) Resonance and whip

Any other suggestions, guys?

-- Chuck Knight