the whole machine adopts microcomupter control and step motor for material feeding . 2,arbitrary fixed length accurate and stable step photo electric tracking .stopp automatically when the any mark is lost . 3.automatic pressure synchronous punching and synchronous sealing . 4.automatic counting ,automatic alarming when reaching preset number . 5.heat sealing decrative border ,automatic constant temperature ,firm and smooth sealing . Main technical parameters Model: FR-DF-900 Max. of bag width: 800mm Max. of bag length 1000mm Bag-making speed(pcs/min)50-120pcs/min Product thickness(mm) 0.009-0.1mm Main motor(kw):2 Overall Power(w): 4.5kw OveraU dimensions (L×W×H)(mm): 2800×1500×1400mm Weight(kg):900kg