BS 6808-3:1989

Foreword
Committees responsible
Code of practice
1. Scope
2. Definitions
3. General
4. Environmental conditions
5. Choice of mechanical reference artefacts
6. Performance verification tests
7. Probing techniques
Figures
1. Step gauges
2. Typical support arrangement for minimum deflection
    at 45 deg inclination
3. Support for gauge blocks up to 1000 mm arranged
    with measuring lines symmetrically disposed about
    a common centre
4. Adjustable support system with a common end plane
5. Space frames
6. Ball-plate
7. A multi-purpose commercially-available artefact
8. Example of a ball-ended rod with magnetic cups for
    kinematic location
9. Extendable bar system
10. Machine checking gauge
11. The four cross-diagonal configurations
12. In-plane diagonal configuration
13. Suggested additional measuring line
14. Position of measuring points for mathematically
    determining alignment of test devices
15. Errors when aligning gauge blocks

Provides the user of coordinate measuring machines with guidance to implement tests set out in BS 6808:Part 2 and more information about further testing requirements for variable environmental conditions.

This Part of BS 6808 gives recommendations to the user and supplier on the more detailed testing recommended if the environmental conditions give rise to problems.

This standard is not intended for coordinate measuring machines that have working volumes, any dimension of which is significantly greater than the dimension of the mechanical reference artefact, or for those having more than three non-redundant axes.