The application and principle of linear scale

linear scale is applied to various types of machine tools, accessories, there are a variety of different models, configuration, problems in the process of use also is not the same, still need to understand! Center is all about the use of grating ruler, to better use of grating ruler must well understand the working principle of the grating ruler is by a grating pair of main grating (i.e., scale grating) (i.e., indicating grating) and deputy grating relative displacement, in being under the function of light interference and diffraction, black and white (or darkness) the rules of the fringe pattern, called the moire fringe.

Through the photoelectric conversion device to make black and white (or light) the same changes of electrical signal into sine wave stripe, repass amplifier amplifier, shaping circuit plastic, two way differ is 90 o sine wave or square wave, into the grating digital display table counter.