Mechanical and Electrical Run-Out Removal on a Precision Rotor-Vibration Research Spindle

[+] Author and Article Information
G. A. Horattas, M. L. Adams

Department of Mechanical and Aerospace Engineering, Case Western Reserve University, Cleveland, Ohio 44106

F. Dimofte

NASA Lewis Research Center, Cleveland, Ohio 44135

J. Vib. Acoust 119(2), 216-220 (Apr 01, 1997) (5 pages) doi:10.1115/1.2889706 History: Received January 01, 1995; Online February 26, 2008


Experimental determination of both steady-state and dynamic performance of a journal bearing requires the use of a high precision spindle with a vanishingly small range of run-out. This was achieved by first eliminating the mechanical run-out of the spindle by grinding the journal specimen while rotating in place. Once the mechanical run-out was removed, the electrical run-out sensed by the displacement proximity-probe-transducers was also removed. Using this procedure the mechanical and electrical run-outs of a research spindle were reduced to less than 0.2 micron (10 μin.), which is better than the resolution of the data acquisition system, 1 micron (50 μin.).

Copyright © 1997 by The American Society of Mechanical Engineers
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