... PLC Mechanical Stacker Characteristics:1.Vertical stack, ascend up and descend down by electro-motion, output transverse automatically.2. ... adopts PLC multi- section speed controlling, auto paperboard piling up, pile height: 1500mm, max paperboard piling length: 3000mm, ... adopts PLC multi- section speed controlling, auto paperboard piling up, pile height: 1000mm, max paperboard piling length: 2500mm, ...