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Bicubic Patch Surfaces for High-Speed Numerical Control Processing

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2 Author(s)
Dimsdale, B. ; IBM Los Angeles Scientific Center, 1930 Century Park West, California 90067, USA ; Burkley, R.M.

Parametric bicubic patch surfaces have been used for some time in manufacture and design. It is convenient to have such surfaces available as standard numerical control surfaces using the APT programming language. A major drawback is that they are costly to use for data processing of numerical control programs. If, however, nonparametric bicubics are used, computer time, and hence cost, can be reduced dramatically. This paper details a strategy and algorithms for this purpose. Experimental data suggest that computer costs are comparable to, or somewhat lower than, the costs for processing tabulated cylinder surfaces.

Note: The Institute of Electrical and Electronics Engineers, Incorporated is distributing this Article with permission of the International Business Machines Corporation (IBM) who is the exclusive owner. The recipient of this Article may not assign, sublicense, lease, rent or otherwise transfer, reproduce, prepare derivative works, publicly display or perform, or distribute the Article.  

Published in:

IBM Journal of Research and Development  (Volume:20 ,  Issue: 4 )

Date of Publication:

July 1976

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