Art,
If you are going as far as to add electronic 'gearing' per se, why not use a PC to make it full CNC? You could still use your electronic gear concept, plus add a whole bunch of additional capabilities to the machine. The PC would also give you thoughtless repeatability by merely calling up a file you already configured...plus enough flexibility to let you take on things that regular Legacy owners only dream of like 3D statues and other parts that you just can't do on a Legacy. It wouldn't take much to add PC control to your already planned for rails and gears. Steppers that can be used for precise CNC control, can also be used effectively as a speed controlled motor as well. Of course I say none of this to discourage you or belittle your creative process....just letting you know of other options.
Just a thought...
-Brady |