The incremental magnetic grid encoder has the following characteristics: 1. Small size, moderate accuracy, and affordable price. By reading the magnetic field changes of the magnetic encoder, the speed signal of the motor can be obtained. Due to the limitations of magnetic materials and magnetic fields, the accuracy and resolution of incremental magnetic grating encoders are relatively low. 4. Strong anti pollution ability, can be used in harsh environments such as dust and oil pollution. 5. Suitable for scenarios with moderate precision requirements and harsh environments.