Parallel mechanisms with two or three degrees of freedom

Parallel manipulators for the machine tool industry have been studied extensively for various industrial applications. However, limited useful workspace areas, the poor mobility, and design difficulties of more complex parallel manipulators have led to more interest in parallel manipulators with tess than six degrees of freedom (DoFs), Several parallel mechanisms with various numbers and types of degrees of freedom are described In this paper, which can be used in parallel kinematics machines, motion simulators, and industrial robots.