Metrology Instruments: Outlining the New Form Talysurf® PGI NOVUS

Wednesday, September 26, 2018

Form, roughness, and topography are most commonly measured using contact metrology instruments, which acquire surface profiles by moving a sensitive stylus across the measured component in a pre-defined direction. A diamond tip with micrometre (μm) dimensions acquires variations in resistance to applied pressure, but this is typically limited to variations across a single plane. Measuring diameter, angle, and surface finish in normal and inverted directions therefore requires longer profiling times with commensurately reduced precision.

Novel metrology instruments have focussed on improving the capacities of the stylus gauge to enhance the measurement capacities for small, medium, and large complex components such as bearings and injectors.

Talysurf® PGI NOVUS: The New Original Metrology Instrument
The new Form Talysurf® PGI NOVUS is equipped with a revolutionary dual bias gauge that provides unparalleled diameter measurements at sub-micron levels, down to a resolution of 0.2 nanometres (nm). Automated stylus force control and reverse bias delivers tight control of measurement parameters, from diameter and angle to surface form and roughness.

Variable stylus lengths provide a dynamic gauge range up to an industry-leading 40 mm capacity for total surface finish measurements. The 10, 15, and 20 mm gauge ranges also satisfy the highest standards for radial and form accuracy. This is further supported by an intuitive automatic lift-lower, which minimises the movement of the gauge during batch, discontinuous, diameter, and internal or external angle measuring modes.

This represents the ultimate measuring accuracy for large-scale surface profiling with unrivalled accuracy at the submicron range. Among the critical surface finish measurements carried out by the Talysurf® PGI NOVUS are roughness and waviness, form error and radius, slope analysis, step height, departure from true form, and more.

Conventional metrology instruments are often limited by their ability to only perform two-dimensional analysis of a surface profile. The Talysurf® PGI NOVUS enables 3D data conversion using novel Metrology 4.0 software. Surface finish and contour data can be transformed for 3D mapping of complex components to assess surface variations in the greatest possible detail.

Metrology Instruments from Taylor Hobson
Taylor Hobson has been intrinsically linked to development and innovation in the field of surface measurement since the very first surface and roughness metrology instruments were engineered at the start of the 20th Century. The Talysurf® PGI NOVUS represents a significant step forward for measurement speed and accuracy for complex shapes such as: ball screws; spherical, roller, and four-point contact bearings; gears; and fuel injectors.

If you would like any more information about the Talysurf® PGI NOVUS, please browse our product brochure. Or, if you have a specific question about any of our metrology instruments, please do not hesitate to contact us.

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