Construction of an error map of rotary axes on a five-axis machining center by static R-test

Abstract This paper proposes an efficient and automated scheme to calibrate error motions of rotary axes on a five-axis machining center by using the R-test. During a five-axis measurement cycle, the R-test probing system measures the three-dimensional displacement of a sphere attached to the spindle in relative to the machine table. Location errors, defined in ISO 230-7, of rotary axes are the most fundamental error factors in the five-axis kinematics. A larger class of error motions can be modeled as geometric errors that vary depending on the angular position of a rotary axis. The objective of this paper is to present an algorithm to identify not only location errors, but also such position-dependent geometric errors, or “error map,” of rotary axes. Its experimental demonstration is presented.

[1]  Soichi Ibaraki,et al.  Influence of position-dependent geometric errors of rotary axes on a machining test of cone frustum by five-axis machine tools , 2011 .

[2]  J.R.R. Mayer,et al.  Single setup estimation of a five-axis machine tool eight link errors by programmed end point constraint and on the fly measurement with Capball sensor , 2009 .

[3]  Masaomi Tsutsumi,et al.  Identification of angular and positional deviations inherent to 5-axis machining centers with a tilting-rotary table by simultaneous four-axis control movements , 2004 .

[4]  Guy Cloutier,et al.  Theory and simulation for the identification of the link geometric errors for a five-axis machine tool using a telescoping magnetic ball-bar , 2002 .

[5]  W. T. Lei,et al.  Double ballbar test for the rotary axes of five-axis CNC machine tools , 2007 .

[6]  Masaomi Tsutsumi,et al.  Identification and compensation of systematic deviations particular to 5-axis machining centers , 2003 .

[7]  R.M.D. Mahbubur,et al.  Positioning accuracy improvement in five-axis milling by post processing , 1997 .

[8]  Wolfgang Knapp,et al.  Model-based ‘Chase-the-Ball’ Calibration of a 5-Axes Machining Center , 2006 .

[9]  S. Weikert,et al.  R-Test, a New Device for Accuracy Measurements on Five Axis Machine Tools , 2004 .

[10]  Stephen C. Veldhuis,et al.  Modelling geometric and thermal errors in a five-axis cnc machine tool , 1995 .

[11]  Bernhard Bringmann.  Improving geometric calibration methods for multi-axis machining centers by examining error interdependencies effects , 2007 .

[12]  J. A. Soons,et al.  Modeling the errors of multi-axis machines : a general methodology , 1992 .

[13]  Soichi Ibaraki,et al.  Error Calibration on Five-axis Machine Tools by on-the-machine Measurement of Artifacts using a Touch-trigger Probe , 2010 .

[14]  Mohamed A. Elbestawi,et al.  A Strategy for the Compensation of Errors in Five-Axis Machining , 1995 .

[15]  Yoshiaki Kakino,et al.  A Study on the Motion Accuracy of NC Machine Tools (7th Report) : The Measurement of Motion Accuracy of 5 Axis Machine by DBB Test , 1994 .

[16]  Robert Schmitt,et al.  Geometric error measurement and compensation of machines : an update , 2008 .

[17]  Soichi Ibaraki,et al.  Prediction and compensation of machining geometric errors of five-axis machining centers with kinematic errors , 2009 .

[18]  Wolfgang Knapp,et al.  Machine tool calibration: Geometric test uncertainty depends on machine tool performance , 2009 .