Abstract
Six double dwell cams made to four different designs by six different manufacturing techniques have been tested on a specially designed cam dynamic test fixture. Acceleration waveforms have been measured on the follower system and transformed to the frequency domain. These frequency spectra have been averaged over selected bandwidths between zero and 3200 Hz and these data subjected to statistical analyses to determine significant differences between manufacturing methods, and cam designs. All of the manufacturing techniques listed show significant differences in at least some of the frequency bandwidths in terms of the total “noise” or r.m.s. error produced in the acceleration waveform. The results indicate that some common manufacturing methods for cams are significantly better than others with respect to fidelity to the theoretical acceleration waveform. The manufactufacture is also shown to interact significantly with the cam acceleration design chosen.
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