what is the minimum oz-in rating I should get my stepper motors at?
"What type of mill/router should I get." Isn't the point of this exercise to be making that? Or am I missing something?
I would strongly suggest checking out http://www.cnczone.com/forums/index.php and looking at some of the many build logs that are posted there to get ideas.
Approximate machineable area 33"x15"x7"
3 x L298N 46 Volt 4 Amp max load (Bought)
Power supply either build my own
That chip is only 2A per channel and your motors take much more than that.Did you see my project:-http://www.thebox.myzen.co.uk/Hardware/CNC_Conversion.html