Uncoiler: A powered roller (motor or hydraulic motor-preferably hydraulic motor, convenient for speed adjustment) is required on the top of the steel coil. Functions: 1. Prevent the steel coil from springing up after cutting the fixed steel coil. 2. , Prevent the steel coil from loosening when the opened steel coil enters the pinch roll or straightening machine. When the steel plate enters the pinch roller, this roller is no longer needed, and the winder does not have this roller. Winding machine: there is a tensioning machine, which brings a certain tension when winding, so that the steel coil is tightly wound. The decoiler does not have this mechanism.