第一批能够满足机器控制系统精度要求的光学编码器价格昂贵,因此没法与已被公认的旋转变压器竞争。但随着设计和制造方法的改进,其价格下已降到可以与旋转变压器相竞争的水平。目前可以买到的编码器结实耐用,适于机床使用,而旋转变压器的价格却在上涨。由于机床性能要求在不断地提高,涉及到了反馈线路中机械接触问题。为此旋转变压器开始 The first optical encoders to meet the accuracy requirements of machine control systems were expensive and could not compete with the accepted rotary transformers. But as the design and manufacturing methods have improved, the price has dropped to the point where it can compete with resolvers. Currently available encoders are robust and suitable for use with machine tools, while the price of resolvers is on the rise. As machine tool performance requirements continue to improve, it involves the feedback line in the mechanical contact problems. The resolver is started for this purpose