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Closed-Loop Transmission Routings for Cartesian SCARA-Type Manipulators

[+] Author Affiliations
Thierry Laliberté, Clément Gosselin

Université Laval, Québec, QC, Canada

Dalong Gao

General Motors, Warren, MI

Paper No. DETC2010-28718, pp. 281-290; 10 pages
  • ASME 2010 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
  • Volume 2: 34th Annual Mechanisms and Robotics Conference, Parts A and B
  • Montreal, Quebec, Canada, August 15–18, 2010
  • Conference Sponsors: Design Engineering Division and Computers in Engineering Division
  • ISBN: 978-0-7918-4410-6 | eISBN: 978-0-7918-3881-5
  • Copyright © 2010 by ASME and General Motors


SCARA-type manipulators are widely used in industry. SCARA motions can be produced by serial SCARA arms or by Cartesian rail-mounted mechanisms, such as in overhead cranes. This paper focusses on the latter mechanisms which are referred to here as Cartesian SCARA-type manipulators. When such mechanisms are actuated, the motors are generally moving, which increases the inertia of the system. In this paper, several closed-loop cable/belt routings are proposed in order to allow the actuation of Cartesian SCARA-type manipulators from four actuators fixed to the ground. Then, the kinematic analysis of these routings is performed, which reveals that decoupled actuation is possible and leads to great advantages regarding the power needed. Finally, preferred routings are selected and an example of application is given.

Copyright © 2010 by ASME and General Motors
Topics: Manipulators



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