A conveyor belt support system for a conveyor having a belt movable along a frame includes a plurality of support slats each extending substantially along a longitudinal axis of the belt. The plurality of support slats is adjustable in position relative to the belt.A processing machine for scanning and portioning a workpiece includes a scanning station configured to scan a workpiece to ascertain at least one physical parameter of the workpiece, a portioning station configured to portion the scanned workpiece, a conveyor for moving the workpiece beneath the scanning station and the portioning station that includes a belt with an open form moveable along a frame, and the conveyor belt support system located beneath at least the scanning station.