Measurement of movement error and its compensation for 6-DOF parallel mechanism worktable

摘要

In this study, a small, 6-DOF (degree of freedom) parallel mechanism worktable for machine tool was developed. There are a lot of factors that affect the positioning precision and the accuracy of the machine tool. The uncertainty in position is mainly due to the structure rigidity, the geometric error of parts and the assembly errors. It is very difficult to estimate the assembly errors and the link parameter of each part. In this paper, the uncertainty factors in positioning of the worktable were investigated, and the error was compensated based on measuring the movement error by CMM (coordinate measuring machine).