BS 7172:1989

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Guide to assessment of position, size and departure from nominal form of geometric features

Published By	Publication Date	Number of Pages
BSI	1989	22

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Description

This British Standard provides information and guidance to manufacturers of coordinate measuring machines (CMMs), and particularly software writers within the CMM industry. It contains recommendations for determining the position, size and departure from nominal form of geometric features, given measurements of coordinates of points on a workpiece. The features covered correspond to the following geometric elements: lines, planes, circles, spheres, cylinders and cones.

This standard is concerned with software implementations of algorithms based on sound mathematical and computational principles, rather than automated versions of manual or graphical assessment procedures.

This standard does not provide detailed guidance on methods for treating data gathered in an unstable environment.

This standard does not cover secondary attributes, i.e. measures derived from departures from form of the above geometric elements, such as parallelism, concentricity or orthogonality.

This standard primarily relates to CMMs that operate with a right-handed Cartesian coordinate system. It also relates to other measurement systems that provide such coordinates. Some of the guidance provided also applies to other coordinate systems.

For manufacturers of coordinate measuring machines (CMM’s) and software writers within the CMM industry. To promote better use of CMM’s for assessment of geometric form.

Additional information

Status	Confirmed
Pages	22
Publication Date	1989-07-31
ISBN	0 580 17359 3
Standard Number	BS 7172:1989
Title	Guide to assessment of position, size and departure from nominal form of geometric features
Descriptors	Shape, Dimensional measurement, Computer applications, Formulae (mathematics), Computer software, Position, Size measurement, Analytical geometry, Coordinates (mathematics), Measurement
Publisher	BSI
Committee	TPR/1
ICS Codes	35.080 - Software

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BS 7172:1989

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