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Methods for the assessement of departure from roundness - Measurement of variations in radius
Establishes types of contact (stylus) instruments to be used, recommendations for their use, procedures for calibration of instruments and verification of their characteristics.
Applies to a profile transformation, obtained under reference conditions.
Departures from roundness of the measured profile, procedure, calibration and determination of systematic errors of rotation are dealt with in annexes A to D, respectively.
Annex E gives rules for plotting and reading polar graphs.
The position of the least squares centre can be calculated from a simple explicit equation given in annex F.
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