Title: Dynamic synchronous accuracy of translational and rotary axes

Authors: Ryuta Sato, Masaomi Tsutsumi

Addresses: Advanced Technology R&D Centre, Mitsubishi Electric Corporation, 8-1-1, Tsukaguchi-Honmachi, Amagasaki, Hyogo 661-8661, Japan. ' Tokyo University of Agriculture and Technology, 2-24-16, Naka-cho, Koganei, Tokyo 184-8588, Japan

Abstract: This paper describes the dynamic synchronous accuracy of the translational and rotational axes in five-axis machining centres. In this study, non-uniform three-axis synchronous motion is investigated in order to estimate the dynamic synchronous accuracy. A dynamic model of each axis including a rotary axis is developed, and the synchronous motion is simulated. The dynamic model consists of a moment of inertia, Coulomb|s friction, viscous friction, and controllers. As a result of the experiment and simulation, it is clarified that the developed model can express the experimental results accurately. In addition, a controller tuning method that can improve the synchronous accuracy is proposed, and its effectiveness is clarified by the developed dynamic model.

Keywords: synchronous accuracy; measurement; machine tools; rotary axis; dynamic modelling; simulation; machine tool control; controller tuning; ball-bars; translational axis; five-axis machining centres; synchronous motion.

DOI: 10.1504/IJMMS.2011.041469

International Journal of Mechatronics and Manufacturing Systems, 2011 Vol.4 No.3/4, pp.201 - 219

Received: 28 Apr 2010
Accepted: 31 Jul 2010

Published online: 24 Jul 2011 *

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