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Error Modeling in a Reconfigurable Machine Tool

[+] Author Affiliations
Deepak Giri, Yong-Mo Moon

Worcester Polytechnic Institute, Worcester, MA

Paper No. DETC2005-84513, pp. 1001-1007; 7 pages
doi:10.1115/DETC2005-84513
From:
  • ASME 2005 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
  • Volume 7: 29th Mechanisms and Robotics Conference, Parts A and B
  • Long Beach, California, USA, September 24–28, 2005
  • Conference Sponsors: Design Engineering Division and Computers and Information in Engineering Division
  • ISBN: 0-7918-4744-6 | eISBN: 0-7918-3766-1
  • Copyright © 2005 by ASME

abstract

This paper proposes a new approach for tool tip error estimation for reconfigurable machine tools by linearly adding the module errors represented by a screw in global coordinate. The presented method is ideal for modular structured reconfigurable machine tools since the errors are represented in modules’ coordinate system in coordinate independent screw representation method. The contribution of each error sources is then estimated by linear combination (AKA parallel combination) after the error screws are transformed into the global coordinate system of the machine tools. The presented method is verified through the comparison with the serial matrix multiplication method proposed by Moon et al. [3] Simulations for the above mentioned methods are run and total tool tip errors are compared to study the feasibility of parallel method. The study shows the errors are smaller for parallel combination and both methods have similar trends over the work volume.

Copyright © 2005 by ASME

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