When the incremental rotary encoder shaft rotates, there is a corresponding pulse output. The discrimination of the direction of rotation and the increase or decrease of the number of pulses are realized by the rear direction judgment circuit and counter. The starting point of the counting can be setting freely, and the infinite cumulative and measurement of multiple circles can be realized. When the number of pulses is fixed and the resolution needs to be increased, the original pulse number can be multiplied by using two signals of 90° phase difference A and B.

Non contract magnetic ring encoder equipped with the seven different size. The location sensor highest resolution is up to 16384ppr, which can satisfy with the different size of the spindle motor encoder. the sensor is made of the ABZ three phase output`s read head and magnetic source body. The machine encoder read head and magnetic source body sealed in metal shell, and output the industry standard ABZ wave square signals. ROUNDSS rotary magnetic ring encoder with the same advantage as integrated encoder, no need to change the original synchronous pulley and mount it at the position of original synchronous pulley