Author(s)

S. Ibaraki, Y Kakino, K. Lee, Y. Ihara, J. Braasch & A. Eberherr

Abstract

Diagnosis and compensation of motion errors in NC machine tools by arbitrary shape contouring error measurement S. Ibaraki', Y. Kakino', K. Lee', Y. Ihara^, J. Braasdr* & A. Eberherr* Department of Precision Engineering, Kyoto University, Japan 2 Department of Mechanical Engineering, Osaka Institute of Technology, Japan Dr. Johannes Heidenhain GmbH, Germany Abstract The DBB (double ball bar) method is widely accepted as a tool to measure the motion accuracy of NC (numerically controlled) machine tools and to diagnose their error sources. The DBB method can only perform circular tests due to its nature. Motion errors due to the mistuning of CNC servo control systems are, however, often easier to observe on non-circular paths. In this paper, we present an overview of a method to diagnose motion errors due to servo control systems by measuring the machine's motion accuracy in arbitrary shape contouring, and then to re-tune CNC servo control systems such that the optimal contouring per

Keywords