2. Practical application1. Full closed loop control systemIn theory, the closer to the drive axis (lead screw pair), the more accurate the measurement is. Due to the limitation of structure space, there are only two ways to install the grating ruler, one is near the side of the lead screw, the other is installed outside the guide rail. It is recommended to select the first installation method as far as possible, but it is not convenient to repair and maintain. On the contrary, the grating ruler with high precision is selected, but the accuracy required by CNC machine tool is not achieved. Even in the first case, the installation position of the grating ruler is close to the drive axis, but there is a certain distance between the installation position and the driving axis.
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