2.6 Stylus Probe Instrument

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  • Опубліковано 3 гру 2024
  • the Stylus is a device similar to the stylus that comes with mobile phones. It moves along the surface and records the irregularities on the surface.
    These methods enable to determine a numerical value of the surface finish of any surface.
    Skid or shoe which is drawn slowly over the surface either by hand or by a motor drive. The skid when moved over the surface follows its general contours and provides a datum for the measurements.
    A stylus or probe moves over the surface with the skid. The stylus should be cone-shaped with a spherical tip. This records the micro-geometrical form of the surface. It moves vertically up and down relative to skid movement due to the roughness of the surface.
    As the stylus tracks the surface peaks and valleys, its vertical motion is converted to a time-varying electrical signal that represents the surface profile.
    Generally, it is desired that if the skid is moving up then the stylus must also be moving up.
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