微机数控伺服驱动系统的自动升降速处理

微机数控系统在启动、停止或切削加工过程中改变进给速度时，由于于侗服驱动元件的响应频率跟不上微机插补运算所输出的进给指令信号频率，而容易产生失步或超程，直接影响加工精度。本文较为详细地分析了以微机数控用步进电机或直流伺服电机作为伺服驱动元件的开环、闭环（半闭环）控制系统中产生以上问题的原因，介绍了为解决以上矛盾所采取自动升降速处理的原理、方法和步骤。

On the problem of Automatic Speed Control in Micro-computer NC Servo Drive Systems

When changes of feed rate are found to be necesary in a micro-computer NC system at the points of its starting, stopping or in process of its working,stepping out and/or overstepping range are very likely to take place because of the failure of the response frequencies of servo drive parts in keeping pace with those of instruction signals output by the micro-computer interpolations. This phenomenum no doubt will exert direct influences on the machining accuracy. In this paper, a detailed analysis has been carried out on the reasons to produce above mentioned troubles in the open-loop or closed - loop (inclusive of semi - closed - loop) control systems equipped with step motors or DC servo motors as their serveo drive elements. Moreover,are also introduced the priciples, methods and steps adopted by the automatic speed control technique to solve these problems.