Encoder high-speed installation: installed on the shaft end of the power motor (or gear connection). The advantage of this method is high resolution. Since the multi-turn encoder has 4096 turns, the number of motor turns is within this range, which can fully use the full range The disadvantage of improving the resolution is that after the moving object passes through the reduction gear, there is a gear gap error in the back and forth stroke. It is generally used for one-way high-precision control positioning, such as roll gap control for steel rolling. In addition, the encoder is directly installed on the high-speed end, and the motor jitter must be small, otherwise the encoder is easily damaged.