Electric cutter beating cylinder and encoder used for electric cutter beating cylinder

The invention belongs to the technical field of motorized spindles, and particularly relates to an electric cutter beating cylinder and an encoder used for the electric cutter beating cylinder. The electric cutter beating cylinder comprises a drive motor and a transmission mechanism arranged in the drive motor. The drive motor comprises a stator and a rotor. To control over displacement of the electric cutter beating cylinder, the transmission mechanism comprises a lead screw and a lead screw nut in threaded engagement with the lead screw. The lead screw nut is fixedly arranged on the rotor and can rotate along with the rotor so as to drive the lead screw to axially move. The encoder comprises a first magnet ring encoder and an encoder circuit board, wherein the first magnet ring encoder is arranged at the end portion of the rotor, the encoder circuit board is used for detecting and controlling rotation of the first magnet ring encoder so as to be combined with the screw pitch of the lead screw to control the