Easy to adjust to grind at different angles, and designed for stiffness, this scheme works pretty well to fix my major complaints with the normal bench grinders. Features include an easily locked angle adjustment dial, a totally disassociated crossfeed, and a structure incorporating a T-beam table to reduce deflection.
This project cost me about 60$; 25$ for a used bench grinder, 26$ for steel and screws, and 10$ to get the parts welded. (I had a lot of left over 1/2" rod, but that 60$ price tag does not include the wood for the base.)
Step 1: material list
As far as big machines go, you'll need a mill and a welder.
The tool list, continued... and a 3/8" and a #7 drill bit (or whatever you like using for a 1/4-20 threaded hole), a 1/4-20 tap, a woodworking clamp, a hand held drill, a lathe, a whetstone, a circular saw, a file or wood rasp, a hot glue gun, and a Dremel.
The material list.... about 18" of 2x8, about 10" of 2x4, about 17" of 2x1/8" steel, about 40" of 1" angle iron, about 3" of 3/8"x1/8" steel, some sheet metal 4" square, two short 1/4-20 screws, two 1/4-20 thumbscrews, one 1/4-20 wingnut, one 1/4-20 nut, five (5) washers, two wood screws, some wood glue, some hot glue, a couple carriage bolts, and 2" of 1/4-20 threaded rod.