Character Selection Mechanism Design based on Dynamics

Teleprinter typewheel selection and driving system is developed by applying the polydyne cam design method on the actual mechanisms. In the process of the development, the static and dynamic characteristics of the system and the rotational fluctuation of a cam shaft are measured and improved in several times. As a result, it is explained experimentally and theoretically that the residual vibrations are a little larger than that of a linear one-degree-of-freedom system because of nonlinearity such as play of cam follower links, backlash of typewheel shaft and follower system friction. Moreover, on the basis of above-mentioned teleprinter design method, a high speed one is developed, especially by introducing high-speed cam mechanism.