Provided is a positioning fence for use in lumber sawmills and method of using the positioning fence that facilitates automated positioning of lumber for cutting and a method of positioning lumber for cutting. Also provided is a retrofit position fence table and a method of using the retrofit position fence table. A continuous moving track loop has a plurality of paddles laterally positionable across the width of the track. A track moving device is used to adjust the final locked position of the paddles if the paddles are not locked in the desired position.