Marshall Burns wrote:
> George Sachs of Paradyme Systems (<firstname.lastname@example.org>) was talking about
> getting something going on a benchmarking study last summer. More recently,
> Steve Farentinos at PML in Torrance has offerred his CMM for measuring models
> submitted to him with the source CAD files.
I didn't say much about how I planned to measure the parts in the study.
We have developed a piece of software that runs inside the Varimetrix CAD/CAM
program. The software accepts a point cloud generated by a digitizing device
(CMM) and registers the point cloud against the CAD surface or solid model of the
nominal part. This is an iterative process with a stopping rule that allows you
to find the "best-fit" position of the digitized point cloud with respect to the
model. The result is an inspection report in which the point-to-surface
deviations have been minimized.
I plan to use this approach in my study to find the best possible surface profile
tolerance for each measured part.
By the way, I now have solid commitments from 3D Systems and Aaroflex, and
tentative commitment from Compression, Inc. Are there any more takers?
-- Steve Farentinos PML, Inc. 201 W. Beach Ave. Inglewood, CA 90302 310 671-4345 310 671-0858 Fax 310 671-1862 BBS
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