ISO 10360 strongly recommends that a coordinate measuring machine (CMM) be checked regularly during the periods between periodic re-verification. 

Depending on the measurement tasks for which the CMM is used, the most relevant of the following commonly used artefacts should be chosen; some examples are given below:

• a purpose-made test piece that has features representing typical geometrical shapes, is dimensionally stable, mechanically robust, and which has a surface finish that does not significantly affect the uncertainty of measurement
• a ball plate
• a hole plate
• a ball bar
• a hole bar
• a bar that can be kinematically located between a fixed reference sphere and the CMM probe-stylus sphere
• a circular artefact (e.g. a ring gauge)

NPL can calibrate a number of these artefacts including purpose-made test pieces, ball plates, hole plates, ball bars, hole bars and ring gauges.

Please contact us so that we can discuss your requirements with you.

Contact

Customer Service tel: 020 8943 8631
E-mail: dimensional_enquiries@npl.co.uk