Measurement and Analysis of Static Friction for Feed Drives of CNC Machine Tools
Static friction generally exists in feed drive servomechanisms and usually affects the motions of CNC machine tools. In this study, the breakaway experiment is applied to measure the static friction of a feed drive servomechanism generally used in CNC machine tools, and the spectral analysis using the fast Fourier transformation algorithm is applied to analyze the frequency characteristics of the obtained static friction. Several experiments were carried out on a three-axis CNC milling machine so as to illustrate the feasibility of the developed measurement and analysis methods. The experimental results indicate that the static friction of a feed drive servomechanism is clearly position-dependent and the physical interaction of the mechanical parts in the transmission system used by the feed drive servomechanism significantly affects the characteristics of the static friction.
Yusaku Fuji and Koichi Maru
S. S. Yeh and J. T. Sun, "Measurement and Analysis of Static Friction for Feed Drives of CNC Machine Tools ", Applied Mechanics and Materials, Vol. 36, pp. 86-95, 2010