Servo sizes

Ok I am clueless in this area. I have no idea what the requirments
are as far as motor sizes required to run a larger 4'x8' foot table.
I have decided for the acuracy I need rack and pinion is good down
the long axis so thats what ill be working with. Seems to me motor
selction should be made early in my design process? Any
recomendations?


Thanks
Jay