多圆心工件(图1)的测量是比较困难的。一般在万能工具显微镜上,利用极座标法或直角座标法对这种工件进行测量时,存在如下的缺点: 1.在测量前必须进行改变座标的大量运算。 2.测量精度与计算中取点的多少有关,为了 Multi-center workpiece (Figure 1) measurement is more difficult. Generally speaking, in omnipotent tool microscopes, polar coordinates or Cartesian coordinates are used to measure such workpieces, which have the following disadvantages: 1. A large number of operations for changing coordinates must be performed before measurement. 2. Measurement accuracy and take the number of points in the calculation, in order to