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Surftest (Surface Roughness Testers)

38 Quick Guide to Precision Measuring InstrumentsQuick Guide to Precision Measuring InstrumentsSurftest (Surface Roughness Testers) JIS B 0601: 2001 Geometric Product Specifications (GPS) Surface Texture: Profile method Terms, definitions, and surface texture parameters JIS B 0632: 2001 Geometric Product Specifications (GPS) Surface Texture: Profile method Metrological characterization of phase-correct filters JIS B 0633: 2001 Geometric Product Specifications (GPS) Surface Texture: Profile method Rules and procedures for the assessment of surface texture JIS B 0651: 2001 Geometric Product Specifications (GPS) Surface Texture: Profile method Nominal characteristics of contact (stylus) instrumentsFeed deviceColumnProbe (pickup)ProbeStylusWorkpieceFixtureBaseM easuring loopTransducerMeasure-mentprofileStylus tipReferencelineReferenceguide skidNominaltexturesuppressionPrimaryprof ileADconverterProfilefilterParameter evaluation according to JIS B 0601 AmplifierFeeddeviceWorkpiecesurfaceMeasu re-mentloopAppea-ranceDrive UnitZ-axis Signal Transfer UnitInput/OutputInput/OutputQuantizedmea sure-mentprofileQuantizedmeasure-mentpro fileA profile filter is a phase-correct filter without phase delay (cause of profile distortion dependent on wavelength).

In typical surface roughness testers, the taper angle of the stylus end is 60˚ unless otherwise specified. Static Measuring Force Measuring force at the mean position of a stylus: 0.75mN ... The following table lists the relationship between the roughness profile cutoff value λc, stylus tip radius rtip, and cutoff ratio λc/λs.

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  Surfaces, Table, Roughness, Surface roughness

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