Mechanical surface is the surface that is generated by tracing the surface of the workpiece with an ideal stylus ball and morphological filtering.
Stylus method is a measuring method for the two-dimensional recording of a surface by moving a probe system horizontally over the surface using a feed drive mechanism.
(DIN EN ISO 3274)
Entire profile is the profile of the mechanical surface recorded using the stylus method. The most important shape deviations of this profile are: form deviations, waviness, and roughness. (DIN EN ISO 3274)
Parameters, except for the parameters that are defined via section lengths lsc (e.g. Rz, Rp, Rv), are calculated via the evaluation length le.
Traversing length lt is the total distance the probe system covers to record the traced profile. It is the sum of the pre-travel length, evaluation length le and post-travel length.
Nesting index Nic (previously "cutoff wavelength") see "Profile filter".
Evaluation length le is the part of the traversing length that is being evaluated.
Section length lsc (previously "sampling length") is part of the evaluation length. Parameters such as Rz, Rp and Rv are evaluated over several consecutive profile sections of length lsc.
Number of sections nsc refers to the number of sections that are used for the evaluation of parameters Rz, Rp and Rv; five sections are usually used.
Pre-travel length is provided for the transient effects of the filters.
Post-travel length is provided for the attenuation effects of the filters.