Quote Originally Posted by Ger21 View Post
Two motors are used to keep the gantry square, and make it more rigid, not to provide twice the power.
If you drive a gantry with a single screw in the center, it likely will exhibit racking when cutting at the ends of the gantry
Sorry, I should have been clearer. I was thinking of using the servo with two ball screws either side connected with a timing belt. The machine is too large for a single central ball screw.