J-SZ(ZYT)-PX series micro DC reduction motors are composed of SZ(ZYT) series DC motors and PX type ordinary precision planetary reducers, and are equipped with power supplies to achieve stepless speed regulation. They have wide adjustment range, small size, light weight, high efficiency, compact structure, and large output torque, and are widely used in imported equipment and domestic machinery. Such as four-color printing machines, plastic flat sealing machines, food and industrial packaging machinery, oil pipeline thermal insulation detection devices, welding equipment, and other drive devices that require low speed, high torque, and stepless speed regulation. The power supply uses pulse width modulation technology, has advanced short-circuit protection function (its function is detailed in the power supply manual), and outputs 0~220V continuously adjustable DC regulated power supply, so that the motor speed can achieve stepless speed change and other advantages.