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介绍一种电动多轴螺母拧紧机控制系统的基本原理及硬件和软件原理。该系统采用分布式结构，每个轴都由一个以８９Ｃ５１为核心的控制单元控制，保证了定扭矩拧紧实现。独特的高速总线使上位单元与控制单元快速交换信息，保证了各轴间协调工作，以完成特定的拧紧工艺。
This paper introduces the basic principle and hardware and software principle of a control system of electric multi-spindle nut tightening machine. The system uses a distributed structure, each axis by a 89C51 as the core of the control unit to ensure constant torque tightening to achieve. Unique high-speed bus to the host unit and the control unit to exchange information quickly to ensure coordination between the various axes to complete a specific tightening process.