Servo device is an important part of CNC system. In the early 1950s, the feed drive of the world's first NC machine tool was driven by hydraulic pressure. Since the force generated per unit area of the hydraulic system is greater than that generated by the electrical system (about 20:1), the inertia is small and the response is fast, so the feed servo of many NC systems at that time was a hydraulic system. In the early 1970s, due to the oil crisis, the pollution of the hydraulic pressure to the environment, the bulky system, and low efficiency, the American GETTYS company developed a DC large inertia servo motor with large static torque and starting torque and good performance. Introduced in 1974 and applied on NC machine tools. Since then, the open-loop system has been gradually replaced by the closed-loop system, and the hydraulic servo system has been gradually replaced by the electrical servo system.
The development of servo technology
We can get informative information from your post likely we can come to know about Servo Technology, It is used in machines where there are frequent repetitions requiring high precision.
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Servos are typically used for precise velocity, acceleration, and angular or linear locations. Because servo motors are small and powerful, many businesses employ them.