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目前,我国研制的铣床数控系统多采用开环或半闭环控制,控制技术较简单,价格低廉,但很难克服机械传动部件的间隙、弹性变形、工作台的低速爬行及其他原因造成的随机误差。现有国产系统不少采用步进电机作为伺服驱动部件,由于步进电机存在输出转矩不足、响应频率不高、不易调速等缺陷,使机床的伺服精度降低。为提高控制精度,增强驱动能力,我们研制了一种采用数字调节技术的直流调速全闭环铣
At present, the numerical control system developed by our country is mostly open-loop or semi-closed-loop control. The control technology is simple and the price is low, but it is hard to overcome the random error caused by the gap of the mechanical transmission components, elastic deformation, low speed crawling on the workbench and other reasons . The existing domestic system uses a lot of stepper motor as the servo drive components, due to lack of output torque of the stepper motor, the response frequency is not high, easy to speed and other defects, so that the machine servo accuracy reduced. In order to improve the control accuracy and enhance the driving ability, we developed a digital adjustment technology of DC speed closed-loop milling