Error Analysis of Parallel Machine Tool Based on the Monte Carlo Method

3-TPT parallel machine tool for the prototype,the error model was established by considering the impacts of the length error of the drive rod and the position error of the hinge point on the position error of the moving platform.And then,carry out sampling error model based on the Monte Carlo method.Also,the Matlab software is used to simulate and analysis it.As can be seen from the simulation results : Its simultaneously effect of parallel machine tool motion platform position of comprehensive error roughly in between 0.56～0.75 mm,it ’ s about the linkage lever long error and Hooke joint cumulative gap error 1 / 2.3～1 / 1.7,that is less than the input cumulative error sum.Then explain the 3-TPT parallel machine tool cumulative error is small,and the error is less than respectively effect of the error sum.