I used 150 oz on my 2 ft X 6 ft router. I feel these were about the smallest that would drive the set up. Keep in mind that the type of screw ball or acme and bearings that you will be using. Also your srcew pitch or pully set up will control your force and speed. 200 oz motors should be able to drive most setups if gear properly.
__________________ Everything in moderation, including moderation. |