This video demonstrates a fully constrained cable-driven parallel robot with eight cables. Reference:
A. Pott, H. Mütherich, W. Kraus, V. Schmidt, P. Miermeister, A. Verl: IPAnema: A family of cable-driven parallel robots for industrial applications, Mech. Mach. Sci. 12, 119-134 (2013)
Andreas Pott
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Courtesy of Andreas Pott, IPA, Fraunhofer Institute, Stuttgart, Germany