在定位误差带附近自动降为单步驱动，保证定位精度。

In the vicinity of target position, the driving speed is lowered to one-step to guarantee the position accuracy.

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首先要保证定位数据与测深数据是同步的，其次要保证时间的精确度足够高。

First, the positioning data and the elevation data should be synchronized, and then, the accuracy should be high enough.

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在托板定位结构中采用注胶法保证转台定位孔的加工位置精度，以保证定位准确。

Instilling glue method is utilized in holding plate locating structure to assure working position accuracy and ensure exactly locating.

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