Abstract：The geometric errors of the servo machine have important influence on the surface morphology of workpieces.
Based on the theory of multi-body systems, Firstly, this paper used the low body array to describe the topological
structure of the servo system. Then the homoogeneous transformation matrix between the adjacent bodies is explored to
establish the geometric error model. Secondly, Renishaw laser measurement system is used to identify positioning error,
straightness error, pitch error, yaw error and perpendicularity errors between two axes. The error values are plugged into
model to get the geometric synthesis error of machine tool. In the end, three different profile workpieces, which are convex
cone, plane and spherical surface workpiece, are selected as the experimental samples to verify error model in principle.
The results show that surface accuracy of three kinds of compensated workpieces improve by 25%, and the compensation
method can be used for controlling servo machining platform geometric error.
2017, 
