很多生产机械、测量仪表,在工作过程中,往往需要知道它究竟转动了多少角度,所以一般都装有转动角度指示器。最普通的转动角度指示器,是由指针和刻度盘组成的。指针和刻度盘,必须有一个安装在转动轴上,另一个则安装在固定不动的部分。当转动轴转动时,指针和刻度盘之间便发生相对运动,从而指示出转动角度的大小。 Many production machinery, measuring instruments, in the course of their work, often need to know how much it turned the angle, it is generally equipped with a rotation angle indicator. The most common angle of rotation indicator, is composed of a pointer and dial. Pointers and dials, one must be installed on the shaft, the other is installed in a fixed part. When the rotating shaft rotates, relative movement between the pointer and the dial occurs, indicating the size of the rotating angle.