Sample Length
After the data has been filtered using a cut–off, we then sample it. Sampling is done by breaking the data into equal sample lengths. The sample lengths have the same numeric value as the cut-off.
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Skid
The small polished ‘sledge’ or ‘follower’ on the end of the nosepiece which maintains contact with the component to shorten the measurement loop and provide a reference data.
Spacing parameters
The features that determine a spacing parameter usually relate to peaks and valleys or to average wavelengths. Spacing refers to the distance between features on a profile in the x direction, parallel to the nominal direction of the trace
Stylus
When measuring surface finish or roundness by contact method, some means of touching the surface is required. A stylus can be likened to a gramophone needle and is used as a means of transferring information to a gauge or transducer by means of deflection.
