Touch trigger measurement probe

摘要

A measurement probe, for a co-ordinate positioning apparatus such as a machine tool, is described that includes a stylus holder that is deflectably mounted to a probe housing. One or more sensors are provided for sensing deflection of the stylus holder relative to the probe housing. A processor is included for producing a trigger signal when the deflection sensed by the one or more sensors meets a trigger condition, such as a deflection threshold. The probe also includes an accelerometer for measuring acceleration of the measurement probe. The trigger condition applied by the processor is alterable, during use, in response to the acceleration measured by the accelerometer. In this manner, false triggering can be suppressed.

主权项

1. A measurement probe, comprising;
a stylus holder deflectably mounted to a probe housing, one or more sensors for sensing deflection of the stylus holder relative to the probe housing, a processor for producing a trigger signal when the deflection sensed by the one or more sensors meets a trigger condition, and an accelerometer for measuring acceleration of the measurement probe, wherein the trigger signal produced by the processor is only output by the measurement probe when the acceleration measured by the accelerometer is below an acceleration threshold.