Originally Posted by cwm9 
Regardless, I think "tried and true" is better for me than "buy and hope..."
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Got that right buddy!
Now I can clearly see why it only weighs in @ 210. That's a REALLY wimpy looking table casting!
I believe you're right about it being a table-top router. Nevertheless, it looks like it would be very nice for machining anything non-metalic, such as plastics or wood. Haven't seen any plastic injection molds made out of plastic or wood though.
An ACME thread is a typical square thread (not sharp or pointed like standard screw threads) and are used on machine tools (lathes, mills, etc.). Most all manual mills & lathes will utilize acme leadscrews, although I have seen a couple Bridgeport type mills that have ballscrews. No ACME screw company that I'm aware of. Wyle E Coyotee probably knows for sure though.
Ballscrews serve you much better on a CNC for many reasons, not the least of which is negligible backlash. This is an issue with my super-budget X2 CNC conversion. My steppers aren't powerful enough to allow me to ride the brake, so backlash becomes a much bigger issue. I'm just playing though, so I don't need ballscrews or bigger motors.... yet.