The article describes composition of hydraulic control system of lifting device, and adoption of moment-location feedback control to perform displacement and positioning of work piece in correct way.

简要阐述提升装置液压系统组成及采用力-位置反馈控制思想实现工件的移动和定位。

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Smaller work piece with less than 300mm of length and width on XY work bench doesn't need the location precision as high as large work piece.

XY工作台上的长度和宽度都小于300 mm的较小工件不需要像较大工件一样高的定位精度。

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