Looking for some good info on CNCs
I could really use some good reading material on basics of building a CNC.
I would like to build a 2 axis CNC for laser etching/cutting first and work my way up to a 3D mill.
I could really use more info on the following:
-How to properly use screw threads (bearings, mounting, etc)
-Limiting factors to CNC strength (I would like to mill Aluminum eventually, what will I need? Just a higher torque stepper motor?)
-Other important tips in designing and building my own.
Feel free to just post links and ill look more into it. Ive seen a couple decent sites but a few of them werent free.