The Algorithms of the Cross-Coupled Precompensation Method for Generating the Involute-Type Scrolls

[+] Author and Article Information
Jih-Hua Chin, Hu-Wai Lin

Department of Mechanical Engineering, National Chiao Tung University, Hsinchu, Taiwan

J. Dyn. Sys., Meas., Control 121(1), 96-104 (Mar 01, 1999) (9 pages) doi:10.1115/1.2802447 History: Received December 18, 1997; Online December 03, 2007


Cross-coupled precompensation method (CCPM) has been proven efficient in tracking nonlinear spatial curves. It requires a path generating algorithm derived from the mathematical equation of the target curve. This paper discussed the time base transform of target curve from a parametric form. The time based path generating algorithm for the extended involute scroll was then proposed. A comparison among three kinds of tool path generating algorithms were performed. The proposed path algorithms, along with other two algorithms, were implemented and tracked by four different control schemes, US (uncoupled-unprecompensated system), CCS (cross-coupled system), PPM (path precompensation method), and cross-coupled precompensation method (CCPM). The proposed path algorithm for extended involute scroll provided the best accuracy. The proposed algorithm tracked by CCPM achieved the most precise profile especially at high feedrates.

Copyright © 1999 by The American Society of Mechanical Engineers
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