When cutting, the gap between the upper and lower knives is large. According to the information about the aluminum foil of the slitting machine, the increase of the slitting edge of the aluminum foil of the slitting machine means that the gap between the upper and lower edges is larger when slitting. Active cutting of aluminum foil, the faster the speed, the smaller the resistance of the blade. The slower, the opposite. The thickness of the blade corresponds to the resistance. The thicker the blade, the greater the resistance. The thinner, the opposite.