本文介绍了以TMS320 LF 2407a为核心控制器的步进电机自动升降速控制系统与PC机的通讯及程序设计方法。

It's introduced that the controlling system in raising and reducing speed of stepper motor that is based on core controller, TMS320LF2407A, communicates with PC, as well as the method of programming.

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当启动频率较高时，启动时会造成失步，而停止时由于惯性作用又会发生过冲，所以在步进电机控制中必须要采取升降速控制措施。

When the startup speed is higher, stepping motor will lose steps. While stopping, it will also lose steps because of inertia. So, it needs to take speed control measures on control of stepping motor.

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提出了数控系统中一种新的指数升降速控制曲线算法-加权补偿法，该算法用加权平均及权值修正技术，解决了数控系统中指数升降速控制曲线不能任意动态调整的难题。

This algorithm USES weighting mean and modified weight to solve the problem of that the exponential curve of acceleration and deceleration could not be dynamical adjusted freely in CNC.

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