Fine datum choice: Must conform to the datum superposition principle, chooses the design datum or the assembly datum as far as possible takes the localization datum.
精基准选择：要符合基准重合原则，尽可能选设计基准或装配基准作为定位基准。
A group of equations of assembly datum variation is proposed to model assembly tolerance chain and tri-dimensional tolerance analysis result is obtained through solving those equations.
提出用装配基准变动方程组来建立装配公差链模型，通过求解此方程组获得三维装配公差链的分析结果。
The micro Angle error between optical coordinate and mechanical datum coordinate of robot vision instrument due to mechanical assembly can be corrected by high accuracy calibration.
机器人视觉仪器由于机械安装引起的光学坐标系与机械基准坐标系之间的微小的角度误差可以通过高精度标定修正。
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