Features: 1) Cutting edge of materials before packing is the important tache 2) Tension can be controlled automatically with magnetic powder arrester 3) Let-off with EPC, photoelectricity edge rectifying system (high precision) 4) Even light under check panel. 5) The width of cutting can be adjustable during machine working 6) Let-off and rewind adopt air shaft, link with safety nip, easy to remove 7) Rewind to the centre 8) Can stop automatically with figure displaying meter and yard machine 9) The main drive gears adopt electric decelerator machine, controlling the speed by frequency conversion