Abstract
This study proposes a new machine tool based on a new type of parallel mechanism platforms. Most parallel mechanisms, which are applied to machine tools, are based on Stewart-Gough platform that is consisting of several telescopic struts. Then, a new type of parallel mechanism platforms consisting of several linear motion actuators and constant-length rods is developed. This paper describes the feature of the new platform by comparison with Stewart-Gough platform, evaluating result of its maximum acceleration, maximum feed rate, positioning repeatability, absolute positioning accuracy and static stiffness. As a result, developed platform is 6.4 times higher than Stewart-Gough platform in natural frequency of the actuator, and 4 times higher in static stiffness of the actuator.
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