Advertisement

Interface between CAD and Rapid Prototyping systems. Part 2: LMI — An improved interface

  • Chua Chee Kai
  • Gan G. K. Jacob
  • Tong Mei
Article

Abstract

The STL (STereoLithography) file format, as developed by 3D Systems, has been widely used by most Rapid Prototyping (RP) systems and is supported by all major computer-aided design (CAD) systems. However, it is necessary to improve the STL format to meet the development needs of RP technologies. In Part 1, several existing and proposed formats have been discussed. This paper, Part 2, will present an improved interface between CAD and RP systems. The new interface is a file format that supports the STL format, removes redundant information in the STL format and adds topological information to balance storage and processing cost. In addition to supporting facet boundary models, the new interface supports precise models by using the edge-based boundary representation. This paper discusses the design considerations of the new interface and data structures for both facet models and precise models. Finally, a comparison of the new interface and the STL file format will be made.

Keywords

Computer-aided design (CAD) Computer-aided manufacture (CAM) Data exchange Rapid prototyping STL (STereoLithography) format 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    “3D Systems Inc.”,Stereolithography Interface Specification, 3D Systems Inc., Valencia, CA, June 1988.Google Scholar
  2. 2.
    K. F. Leong, C. K. Chua and Y. M. Ng, “A study of stereolithography file errors and repair. Part 1. Generic solution”,International Journal of Advanced Manufacturing Technology, 12, pp. 407–414, 1996.Google Scholar
  3. 3.
    K. F. Leong, C. K. Chua and Y. M. Ng, “A study of stereolithography file errors and repair. Part 2. Special cases”,International Journal of Advanced Manufacturing Technology, 12, pp. 415–422, 1996.Google Scholar
  4. 4.
    T. Wohlers, “CAD meets rapid prototyping”,Computer Aided Engineering, pp. 66–74, April 1992.Google Scholar
  5. 5.
    K. Weiler, “Edge-based data structures for solid modelling in curved-surface environments”,IEEE Computer Graphics and Application,5(1), pp. 21–40, 1985.Google Scholar
  6. 6.
    M. K. Agoston,Algebraic Topology, Marcel Dekker, New York, 1976.Google Scholar
  7. 7.
    C. F. Kirschman and C. C. Jara-Almonte, “A parallel slicing algorithm for solid freeform fabrication process”,Solid Freeform Fabrication Symposium, pp. 26–33, 1992.Google Scholar
  8. 8.
    M. Tong,The Interface between CAD and 3D Layer Manufacturing Systems, Master thesis, Nanyang Technological University, Singapore, 1996.Google Scholar

Copyright information

© Springer-Verlag London Limited 1997

Authors and Affiliations

  • Chua Chee Kai
    • 1
  • Gan G. K. Jacob
    • 1
  • Tong Mei
    • 1
  1. 1.School of Mechanical and Production EngineeringNanyang Technology UniversitySingapore

Personalised recommendations