Abstract
Some new results concerned with the design of POLYCRANK manipulators without joint limits are presented. Main features of such a solution are links in the form of light hollow cranks connected one to the other by cross-roller bearings. The first pre-prototype of POLYCRANK with six DOF’s has been completed and tested. Three first DOF’s, with parallel vertical axes are driven by electric Direct Drive units mounted coaxial in the base of the manipulator. Three last DOF’s are driven by light motors with gears mounted on the last link of the horizontal chain with using parallelograms. High speed of cyclic gross motion in the convex workspace and good isotropic properties are the main advantages of this manipulator. Proper choosing of such mechanical properties like high natural frequency with good damping of vibrations, high stiffness, relatively low Lost Motion, is the basic requirement and it was the main purpose of investigations. Main disadvantages of the previous version are high cost of DD motors and of big diameter cross-roller bearings. A new one version with much more less cost is consider. One of the basic features of it’s is a new serial-parallel modular arrangement of the arm and untypical spherical wrist.
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© 2000 Springer-Verlag Wien
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Nazarczuk, K., Mianowski, K., Łuszczak, S. (2000). Development of the Design of Polycrank Manipulator Without Joint Limits. In: Morecki, A., Bianchi, G., Rzymkowski, C. (eds) Romansy 13. International Centre for Mechanical Sciences, vol 422. Springer, Vienna. https://doi.org/10.1007/978-3-7091-2498-7_30
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DOI: https://doi.org/10.1007/978-3-7091-2498-7_30
Publisher Name: Springer, Vienna
Print ISBN: 978-3-7091-2500-7
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