Profiles and filters (DIN EN ISO 4287:1998 and DIN EN ISO 11562:1998)

The actual surface roughness profile results from the intersection of the actual part surface with a plane perpendicular to this surface. The plane should roughly be vertical to the machining grooves. The measured surface profile is the profile after tracing the actual surface profile using a probe. In doing so, the measured values are filtered through the effect of the stylus tip radius rtip and - where applicable - through the sliding skid of the probe system. Imperfections of the surface, like cracks, scratches and dents do not count as roughness and should not be measured. If necessary, tolerances must be determined for this according to DIN EN ISO 8785. The primary profile is the profile after low-pass filtering the measuring values using the cutoff...