Surface Notes

surface roughness- gemstone polishing - final polished agate

What does it take to make a stone look and feel great?

What makes a stone feel good in your hand? What magnitude of surface roughness is required for it to feel that way? We recently collaborated with stone enthusiast and retired metrologist Bob Rother to find out. Rother wanted to combine his passion for “rock hounding” with his background in process engineering and precision measurement to

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cylinder bore surface roughness

What’s In Your Cylinder Bore?

Engine cylinder bore surfaces are among the most “engineered” surfaces in the world. Millions and millions of hours (and dollars) have been spent on testing and optimizing these surfaces. And countless magazine and journal articles have been published on these surfaces. Despite these efforts, we find that there is no single, “one size fits all”

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Surface Texture Software - Dr. Jessica Arbour uses OmniSurf3D surface texture software for her studies in evolution and morphology

Surface roughness sheds light on how fish evolve

What can surface texture tell us about how biological communities evolve? Dr. Jessica Arbour and her team at Middle Tennessee State University studies differences in morphology (physical traits). Their goal is to better understand why some species “stay with one biological plan” while others explosively diversify into many new forms. Arbour has studied many different

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surface texture software - curved profile tool,omnisurf3d, digital metrology

New Curved Profile Tool in OmniSurf3D

Measuring texture along a linear path is a fairly straightforward process. A stylus-based measurement will do the trick. And, if we have areal (3D) measurement data, we can position a cursor on the path of interest and view it as a profile. But sometimes roughness matters along a curved path — perhaps along a ridge

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measure a chipped or worn cutting tool

Assessing a Chipped or Worn Tool Corner

As you may have seen in this video, analyzing a wear scar on your surface is fast and easy with OmniSurf3D… even when the scar occurs along a curved surface. However, what you may not know is that the OmniSurf3D wear analysis tool can also handle worn or  chipped corners as well. For example, let’s

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gar strip,microfinish comparator gage,surface roughness,surface texture,Digital Metrology

New! Microfinish comparator gage textures in the Surface Library

We made a big addition to the Surface Library this week! The new Microfinish Comparator series includes high resolution, 3D data of the 22 surface texture samples on a GAR S-22 microfinish comparator gage. These textures represent various machining operations and surface roughness amplitudes. Many of us use these kinds of tactile gages to compare

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surface texture analysis shape removal tools with omnisurf3d. ourtesy of Asist. Prof. Alp Eren Şahin and Prof. Dr. Tamer Sınmazçelik from the Mechanical Engineering Department of Kocaeli University in Kocaeli, Turkey.

How to Remove Shape from a Complex Surface

To measure surface texture accurately we need to be able to separate it from the underlying shape. Most surface texture software can remove simple shapes such as tilt and cylinder. Complex surface shape, however, can prove difficult to handle in a lot of software. OmniSurf3D includes a number of flexible tools to handle complex shape.

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Surface Texture and Performance - Brag Lagman QMP Racing - Digital Metrology Solutions

Engine performance? It’s in the surface texture.

QMP Racing’s Brad Lagman tells us how. There’s information about your performance and machining processes hiding in your surface texture. But you need to be able to see it to improve it. No one knows this better than Brad Lagman, founder of QMP Racing Engines in Chatsworth, California. Lagman has been building engines for drag

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Rz Surface Roughness Measurement Parameter not equal to Sz Surface Texture Parameter - Digital Metrology

Is Rz equal to Sz?

Some 2D (profile) parameters are closely related to their 3D (areal) equivalents. For example, Ra and Sa (2D and 3D average roughness), and  Rq and Sq (2D and 3D root mean square roughness) are calculated in similar manners and often produce similar values. Rz, another commonly used 2D parameter, however, does not generally correlate with

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