The printed winding DC servo motor has the advantages of small axial size, high power-volume ratio, wide speed-adjustment range, high linearity, small moment of inertia, large torque output, and stable operation. Its technical performance is advanced and reliable. The motor can be matched with different types of controllers, speedometers and encoders, and has been applied to robots, textile machinery, automatic welding machines, automatic winding machines, and high-precision variable-speed drives such as radar, artillery, and trackers.