摘要 : Analyses the errors of new parallel machine tools and presents a structural scheme for feedback compensati- on of machine tools to eliminate these errors, the theory behind and the relation between direction consine of normal vect... 展开 Analyses the errors of new parallel machine tools and presents a structural scheme for feedback compensati- on of machine tools to eliminate these errors, the theory behind and the relation between direction consine of normal vector of the workpiece surface and the rotation angles α,β,γ of the cutter head. 收起