An amplifier circuit comprises an amplifier circuit input and a first amplifier having an input that communicates with the amplifier circuit input and an output. The end effector includes a pressure roller and a linear motion mechanism. The segments are then synchronously moved radially inwards, so as to reduce an outer diameter of the winding drum to a value smaller than the inner diameter of the bead core. Furthermore, the control module regulates electrical power to a display device fastened to the lift based upon the direction of travel of the support unit. The voltage regulating module regulates the voltage supplied by the power supply adapter according to the control signal, to cause the voltage supplied by the power supply adapter to adapt for the electronic device.