Two sets of pulses are respectively connected to the same servo. One set of pulses controls the forward rotation of the motor, while the other set controls the reverse rotation of the motor. The two sets of pulses will not be triggered simultaneously. There is a program for servo pulse segments behind. The device is an old device that should have been used for five or six years. At that time, only the device action was changed, and after the modification, the device was pulled away without paying attention to how the pulse was transmitted.