Electronic automatic control device for tightness of coil stock

The utility model provides an electronic automatic control device for the tightness of a coil stock. The electronic automatic control device comprises a rack, an unwinding assembly arranged at one end of the rack, a winding assembly arranged at the other end of the rack and a control unit. An unwinding motor on the unwinding assembly is in transmission connection with an unwinding material disc through an unwinding magnetic powder clutch, and a winding motor on the winding assembly is in transmission connection with a winding material disc through a winding magnetic powder clutch. The third guide roller at the upstream of the winding tray is laterally mounted on the rack through a pressure sensor arranged at the bottom of the third guide roller; and the pressure sensor, the unwinding motor, the unwinding magnetic powder clutch, the winding motor and the winding magnetic powder clutch are electrically connected with a control unit. According to a current signal fed back by the pressure sensor, the rotating spe