求翻译：调焦机构开环精度检测开环检测时,以调焦范围内任意数值为调焦期望值,步进电机驱动滚珠丝杠旋转,调焦结束后用编码器检测实际走过的距离是什么意思？

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Adjustment open loop precision testing open loop detects when adjusting the focus, in arbitrary value for adjusting the focus within expectations and step Motor Driver ball spins, adjusting the focus population poles used after the end of the encoder detects actual distance travelled

When the focusing organization split-ring precision examination split-ring examines, take the focusing scope in the random value as the focusing expected value, step-by-steps motor-driven ball bearing guide screw revolving, after the focusing had finished the distance which passes through actually w

The focusing mechanism of open-loop precision measurement of open-loop detection, focusing range values are focusing expectations about stepping motor driven ball screw rotation, focus after the encoder testing actual walked distance

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