Identification Of Damping Elements In A CNC Machine Tool Drive
Author(s)
G. Holroyd, C. Pislaru & D.G. Ford
Abstract
Identification of damping elements in a CNC
machine tool drive
G. Holroyd, C. Pislaru & D.G. Ford
Precision Engineering Centre, University of Huddersfield, UK
Abstract
An understanding of the dynamic characteristics of a machine tool is a vital
element in the control of the machine which has a direct affect on the precision
of the machining which can be undertaken. The ways in which energy is
dissipated, such as friction and damping, have a significant effect on the dynamic
behaviour. This paper outlines an approach to investigating the dynamic
characteristics of an axis drive on a CNC milling machine. The torsional
behaviour of the motor, belt drive and ballscrew coupled with the axial
movement of the table or saddle and the ballscrew nut were considered. The
mechanical elements of the drive were modelled as point inertias coupled by
springs and dampers using Matlab / Simulink. The undamped natural
frequencies and their likely mode shapes were determ
Keywords
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