Severe vibration and poor positioning accuracy may occur in an indexing cam mechanism operating at a high speed. Torque fluctuation of the input shaft and the resulting fluctuation of kinetic energy of the mechanism may be the major cause of the vibration. In this paper a method is proposed to minimize the fluctuation by using a so-called “speed-varying flywheel” that produces an opposite kinetic energy fluctuation that can counteract the effect of the energy fluctuation. The flywheel is installed on the output shaft of an additional cam-linkage mechanism. The parameter of the cam-linkage mechanism is optimized. An example is given to demonstrate the effectiveness of this method.

M. Takano, Dynamics of indexing cam mechanism and speed-up of its motion, Proceedings of the Fifth World Congress on Theory of Machines and Mechanisms, 1979, pp. 1408–1411.
Nishioka, M., State of the Art of Torque Compensation Cam Mechanisms, Proceedings of the Ninth World Congress on Theory of Machines and Mechanisms, 1995, pp. 713–717.
The minimization of the fluctuation of input shaft speed in cam mechanisms
Mechanism and Machine Theory
, pp.
Edward J. Haug and Jasbir S. Arora, Applied Optimal Design, John Wiley & Sons, Inc., New York, 1979.
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