Analysis and compensation of geometric error for five-axis CNC machine tools with titling rotary table
Journal
IEEE/ASME International Conference on Advanced Intelligent Mechatronics, AIM
Pages
350-355
Date Issued
2011
Author(s)
Abstract
In this paper, an approach is proposed to analyze and compensate geometric errors of five-axis machine tools using a novel optical measurement instrument. The instrument consists of two pairs of QDs (quadrant detectors) and triangulation laser probes, one magnetic base and one glass ball. The kinematic and geometric error models of a five-axis machine with a titling rotary table are obtained using the HTM (homogeneous transformation matrix). The error model totally includes 43 geometric errors. The proposed method first analyzes the sensitivity Jacobian matrix and observes what are the critical offsets of five-axis machine which dominant the overall volumetric errors. Three types of error sources consists of the center bias, circle and eccentric are identified. NC test paths such as BK2 are planned according to the inverse kinematic equations. Simulations are performed to generalize the polar plots of error patterns. Finally, the proposed method is applied to compensate the geometric errors of the five-axis machine tool, and the machine accuracy can be significantly improved. ? 2011 IEEE.
Subjects
Center bias
Error model
Error patterns
Error sources
Five-axis
Five-axis CNC machines
Five-axis machines
Geometric errors
Geometry error
Glass balls
Homogeneous transformation matrix
Kinematic equations
Machine accuracy
Optical measurement instrument
Polar plot
Quadrant detectors
Rotary tables
Triangulation lasers
Volumetric errors
Computer control systems
Geometry
Glass lasers
Instrument errors
Intelligent mechatronics
Inverse kinematics
Jacobian matrices
Linear transformations
Machine tools
Mathematical transformations
Measurement errors
Optical data processing
Error compensation
Type
conference paper