A Study of the Elastic Deformation Error of Parallel Kinematic Mechanism Machine Tool

抄録

In the motion error of a parallel kinematic mechanism machine tool, an elastic deformation caused by external forces such as gravity is a significant factor as same as the kinematic parameter errors. Internal forces generated by rotational resistance of the passive joint also deform the mechanical components. In this paper, an elastic deformation error model and a compensation system are presented, which can deal with external and internal forces in common. It is experimentally verified that this method improves the motion accuracy of a parallel kinematic mechanism machine tool.