目前对于座标测量机尚无一种标准的校准程序和精度分级。J.Bury 发展的检验立体精度的技术是,采用四面体形式的空间框架结构,钢球排列在框架构件各已知中心距的角位置上,以测量机的座标读数与已知的框架式构件的座标相比较。这种方法价廉,但不易达到分析或校正的目的。Feranti 公司采用的是与此法相类似的平面误差检验方法,测量机与由许多钢球组成的标准器进行比较,这些钢球分布在平板的整个工作区内。 There is currently no standard calibration procedure and accuracy grading for CMM. The technique developed by J. Burry to detect stereo accuracy uses a tetrahedron spatial frame structure with the balls arranged angularly at known centers of the frame members to measure the coordinates of the measuring machine with known frame- The coordinates of the components are compared. This method is inexpensive, but not easy to achieve the purpose of analysis or correction. Feranti uses a planar error test similar to this method. The measuring machine is compared to a standard consisting of many balls distributed throughout the working area of ​​the plate.