OK, so I let my newbie impulses rule me and I went and bought some really big servo's. These babies do 1500 oz-in and weigh 9 lbs (6.5" long w/encoder and 4" in diameter).
Assuming the router is very rigid and can handle the weight (it won't collapse or rock), at what point does the weight become a problem because of inertia? I mean, you get a 100 lbs gantry moving and it might be hard to stop! LOL.
What is the heaviest you would make a gantry?
P.S. I was thinking of building Ninewgt's design. CNC Router