Analysis of Errors in Precision for Closed Loop Mechanisms

[+] Author and Article Information
Psang Dain Lin, Jen Fun Chen

National Cheng Kung University, Department of Mechanical Engineering, Tainan, Taiwan 70101, ROC

J. Mech. Des 116(1), 197-203 (Mar 01, 1994) (7 pages) doi:10.1115/1.2919346 History: Received April 01, 1991; Online June 02, 2008


An algorithm to analyze the relations of error components for closed loop mechanisms is introduced. The error components considered are errors in link dimensions and error motions due to joint clearances. In order to completely characterize the physical shape of a link, first a revision of the Denavit-Hartenberg symbolic notation is introduced. Then, an error matrix is proposed to account for the effects of error motions due to joint clearances. Six independent equations are obtained. The major benefit from these equations is the capability of assessing the influence of each error component on a machine’s accuracy. This analysis is particularly useful to allocate a machine’s tolerances at its design stage and to characterize the performance of an existing machine.

Copyright © 1994 by The American Society of Mechanical Engineers
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