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Unformatted text preview: rement strategy is used as for the series measurements, thus no additional CNC program has to be prepared. But the main advantage is the fact, that the comparison between measurement and calibration results directly indicates systematic errors of the CMM measurement process. The recording of the deviations together with the relevant measurement conditions in a database points out the influences. Another benefit is that the experimental procedure to estimate the feature specific measurement uncertainty for measurements on series parts can be applied according to the rules of the ISO-Guide to the Expression of Uncertainty in Measurement [GUM, 1995]. The only problem is, to make available normal workpieces traceably calibrated with the specification of measurement uncertainty (acc. to GUM) for each feature and characteristic to be considered. By the application of calibrated sheet metal parts in this particular case, two more impacts must be considered. First of all the fixture system has an effect on the calibr...
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This note was uploaded on 08/03/2010 for the course DD 1234 taught by Professor Zczxc during the Spring '10 term at Magnolia Bible.
- Spring '10
- The Land