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<p>With the continuous advancement of manufacturing, the demand for high-speed and high-precision performance of CNC machine tool feed systems is growing. The scientificity of design methods directly determines the dynamic performance. However, existing methods over-rely on frequency-domain indices like natural frequency, with vague mapping to user-required time-domain indices (e.g., positioning accuracy, tracking error) in machining. This causes a significant disconnect between design goals and engineering needs. More critically, time-domain accuracy is essentially a comprehensive reflection of dynamic coupling among subsystems like mechanical transmission and servo control. Yet existing studies mostly focus on isolated optimization of a single subsystem. This paper, from a holistic perspective of the feed system, reviews existing design methods. It explores establishing a dynamic comprehensive optimization design system directly oriented to time-domain accuracy requirements. It provides new theoretical support and practical guidance for the dynamic optimization design of CNC machines.</p>

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A review of CNC feed systems dynamics design: time-domain accuracy and coupling mechanisms

  • 期刊论文

  • 发表日期：

    2025年12月10日

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  • Xuesong Wang,
  • Dongsheng Zhang,
  • Wugang Zhang,
  • Zheng Zhang

摘要

With the continuous advancement of manufacturing, the demand for high-speed and high-precision performance of CNC machine tool feed systems is growing. The scientificity of design methods directly determines the dynamic performance. However, existing methods over-rely on frequency-domain indices like natural frequency, with vague mapping to user-required time-domain indices (e.g., positioning accuracy, tracking error) in machining. This causes a significant disconnect between design goals and engineering needs. More critically, time-domain accuracy is essentially a comprehensive reflection of dynamic coupling among subsystems like mechanical transmission and servo control. Yet existing studies mostly focus on isolated optimization of a single subsystem. This paper, from a holistic perspective of the feed system, reviews existing design methods. It explores establishing a dynamic comprehensive optimization design system directly oriented to time-domain accuracy requirements. It provides new theoretical support and practical guidance for the dynamic optimization design of CNC machines.