码盘是供在光电条件下进行自动读数的一种特种度盘,它刻线数多,精度要求高,因而用一般光学方法进行检验,困难很大。码盘光电检验仪是对码盘刻划精度进行光电自动检验的仪器,它的基准是一块用十个读数头进行平差后的光栅度盘,使用时,将被测盘装在仪器主轴上,开动马达使仪器连续运转,被测盘与标准盘各输出一路信号,通过相位计进行相位比较,最后将误差曲线自动描绘在记录仪上。仪器每转一圈约需4分钟。这台仪器经过两年多的使用考验, The encoder is a special type of dial for automatic reading under photoelectric conditions. It has many scribing lines and high precision requirements, so it is very difficult to test with the general optical method. Code photoelectricity tester is an instrument for automatically checking optical encoder’s scribing accuracy. Its reference is a grating optical disk after adjusting with ten reading heads. When using, the measured disk is mounted on the main shaft of the instrument , Start the motor so that the continuous operation of the instrument, the measured disk and standard output of all the way the signal through the phase meter for phase comparison, and finally automatically plot the error curve on the recorder. The instrument takes about 4 minutes per revolution. This instrument after more than two years of use test,