TRIMMER FLEXIBLE POSITIONING FENCE

The board positioning device of the present invention selectively positions in a lateral direction in a generally horizontal plane a board translating in a longitudinal direction in the horizontal plane, wherein the board is aligned along its length in the lateral direction, and the device includes a flexible fence lying in the generally horizontal plane, a fence positioner for selectively positioning the flexible fence in the lateral direction in the generally horizontal plane along a transition path as determined by an optimizer whereby the board may be laterally selectively positioned optimally relative to trimmer saws located downstream from the flexible fence in the longitudinal direction when the board is urged laterally against the flexible fence by lateral ending rolls.