Abstract : This paper introduces the purpose, significance, system structure, and principle of the "Comprehensive Tester for the Operation Status of CNC Systems," emphasizing its testing performance. Its contribution and significance in the quality control of CNC equipment and systems are analyzed. Keywords : CNC tester; testing performance; quality control. In recent years, the import volume of CNC machine tools and the overall production of CNC machine tools in China have shown an upward trend. CNC machine tools and CNC systems are high-performance, high-precision, high-speed, high-flexibility, and high-reliability equipment. Improving the quality of CNC machine tools and CNC systems is not only an urgent task but also a key factor for the survival and development of high-tech industries such as FMS and CIMS. Therefore, the quality control of CNC equipment and systems is an urgent and challenging task. Data shows that although domestic and international CNC system manufacturers have their own testing equipment for detecting various performance indicators of CNC, they lack a unified testing method to evaluate various CNC systems. Therefore, we undertook the national "Eighth Five-Year Plan" key project "Research on CNC Testing Technology and Equipment," and developed a system for testing the Spanish FAGOR-8025 and Shanghai Kaitong CNC Company's MTC-2M CNC. This device is highly specialized and capable of testing various CNC systems. Based on previous key projects, we further developed the "Comprehensive CNC System Operation Status Test." This tester, designed for multi -system testing, has undergone detailed research in improving testing speed, increasing the testing rate range, improving testing accuracy, and expanding quantitative analysis. It is a new product with good versatility and completeness: the CNCM2000-D CNC Comprehensive Tester. 1. Quality Control of CNC Equipment and Systems The quality and reliability of CNC machine tools is a comprehensive science between technology and management, involving a wide range of technical fields. CNC machine tools utilize technologies from multiple disciplines, including mechanics, electronics, pneumatics, hydraulics, and optics, as well as various components, parts, and materials. They are also influenced by factors such as design, manufacturing, equipment, management, storage, transportation, and usage conditions. Therefore, in terms of failure modes, mechanisms, distribution characteristics, and performance indicators, they are neither identical to purely electronic products nor purely mechanical products. CNC machine tools, as complete products, are categorized into several types, including CNC system interface devices, peripherals, power supplies, machine tool drive motors, motor drive units, CNC system software, CNC programming, and the machine tool itself. While the interpolation calculations and control precision of the CNC system's control unit (NC) are high and the error is very small, the static and dynamic errors generated by the dual closed-loop (speed, position) negative feedback automatic adjustment system composed of the servo control unit, servo motor, and encoder, the following errors caused by the unequal open-loop gains of the closed-loop systems of each axis during two-axis linkage, and the load errors of the servo motors are the main factors constituting the control errors of the CNC system and are also the factors that make it difficult to improve the machining accuracy of CNC machine tools. Therefore, directly testing and evaluating the control accuracy of CNC systems is of great significance. However, for a long time, people have only used single tests to measure the control accuracy of servo motors. When evaluating CNC systems and CNC machine tools, the accuracy of machining circular and rectangular workpieces is often measured. If the workpiece exceeds tolerances, it is difficult to determine whether the problem lies with the control accuracy of the CNC system or the mechanical accuracy and rigidity of the machine tool. This is because comprehensive measurements are used, and there are no instruments to directly test the control accuracy of the CNC system. Often, repeated adjustments and machining are required to achieve the required accuracy, and sometimes it even fails to meet national standards. Such testing is time-consuming and costly. Using this instrument to directly test the control accuracy of the CNC system and adjust the optimal parameters during the assembly and commissioning of CNC machine tools can improve the machining accuracy and debugging efficiency of CNC machine tools. When selecting a CNC system model, using it to compare and test the control accuracy of multiple similar CNC systems can provide a basis for system selection. [b][align=center]For more details, please click: Comprehensive Tester for CNC System Operation Status and Quality Control of CNC Equipment and Systems[/align][/b]