Tool Positioning for Noncircular Cutting With Lathe

[+] Author and Article Information
M. Tomizuka, M. S. Chen, S. Renn, T. C. Tsao

Department of Mechanical Engineering, University of California Berkeley, CA 94720

J. Dyn. Sys., Meas., Control 109(2), 176-179 (Jun 01, 1987) (4 pages) doi:10.1115/1.3143836 History: Received October 20, 1986; Online July 21, 2009


This paper presents the design and implementation of a digital controller for a lathe to machine workpieces with noncircular cross sections. Noncircular cutting is accomplished by controlling the radial tool position in the direction normal to the surface of workpiece. A discrete time model for the tool carriage in the radial direction is obtained by a least squares method applied to input and output data. The model is used for designing digital feedback and feedforward controllers. The zero phase error tracking control algorithm is applied as a feedforward control law for positioning of the tool along desired time varying signals. The effectiveness of the proposed controller is demonstrated by experiment and simulation.

Copyright © 1987 by ASME
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