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TECHNICAL PAPERS

Feed, Speed, and Torque Controllers for Drilling

[+] Author and Article Information
R. J. Furness, C. L. Wu

Manufacturing Systems Department, Ford Research Laboratory, Ford Motor Company, Dearborn, MI 48121

A. Galip Ulsoy

Department of Mechanical Engineering and Applied Mechanics, University of Michigan, Ann Arbor, MI 48109

J. Eng. Ind 118(1), 2-9 (Feb 01, 1996) (8 pages) doi:10.1115/1.2803645 History: Received August 01, 1993; Revised January 01, 1994; Online January 17, 2008

Abstract

The design and implementation of feed, speed, and torque controllers for drilling is discussed. Dynamic models of the feedrate drive and spindle motors were developed using experimental data and least squares estimation. These dynamic models were subsequently used to design closed loop feed and speed controllers, which allow for independent control of the machining feed and speed during drilling. They effectively track constant, as well as step-change, command references. Subsequently, the feed controller was used to develop a dynamic model between feed and torque, and then was cascaded with a torque control loop. The dynamic modeling and subsequent closed loop controller design and performance are described.

Copyright © 1996 by The American Society of Mechanical Engineers
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