Renishaw Plc

Jamie John Buckingham

Jonathan Paul Fuge

Peter Kenneth Hellier

John Charles Ould

Tim Prestidge

Derek Marshall

Michael John Wooldridge

John Anthony Styles

Ben Richard Holden

Stephen Peter Ewen

A measurement probe is described that includes a probe body, a stylus that is deflectable relative to the probe body, and a plurality of sensor elements for generating a sensor signal indicative of stylus deflection. An analyser is provided, optionally as part of a trigger unit, to analyse the sensor signals and issues a trigger signal to indicate the stylus has contacted an object. The analyser is arranged to combine a plurality of the sensor signals to generate a resultant deflection signal for comparison to a deflection threshold and is also arranged to detect oscillatory motion of the stylus by analysing at least one of the sensor signals. The analyser only issues a trigger signal when the resultant deflection signal crosses the deflection threshold and no oscillatory motion of the stylus is detected. The measurement probe may be used on a machine tool or other coordinate positioning apparatus.

Measurement probe apparatus and method

A measurement probe, such as a touch trigger measurement probe, is described that comprises a measurement portion for measuring an object and a data transfer portion for receiving data from and/or transmitting data to an associated unit. The measurement device also comprises an authentication module for verifying the authenticity of the associated unit. The authentication module may include a processor for running a one-way hash algorithm. Authenticity may be established using a challenge and response authentication process.

Measurement probe systems for co-ordinate positioning apparatus

A dimensional measurement probe () is mounted in a machine tool (), which reorientates the probe about at least one axis A. Strain gauges () sense when a stylus () of the probe contacts a workpiece (), to produce a trigger signal. False trigger signals may be produced when the probe is reorientated. To overcome this, the reorientation is detected by monitoring changes in the fluctuations of the strain gauge outputs, caused by vibrations of the stylus.

Method of determining measurement probe orientation

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Plymouth, United Kingdom

Jamie John Buckingham