Use the correct filter cut-off when measuring surface roughness

Article Abstract:

Two new methods have emerged to ensure that measurements on surface roughness are accurate. The first method involves the determination of cut-off by evaluating the leveled, unfiltered profile on atypical surfaces. Another method proposes that the cut-off on a measurement must be increased to the next highest level. The choice of the proper filter cut-off is vital to the accuracy of the measurement since roughness can fluctuate whenever the cut-off is altered. However, some manufacturing processes and functional requirements may require a different cut-off.

---

Quantitative surface roughness measurements

Article Abstract:

Scanning probe microscopy (SPM) is gaining popularity as a surface topography measurement tool due to the demands imposed by shrinking component sizes. SPM gives information regarding the quantitative height and lateral dimensions of small surface features at a subangstrom height resolution. SPM accomplishes this using a sharp tip that scans surfaces following a raster pattern. Through statistical analysis, special software can provide data regarding surface roughness from topographical information obtained by the tip.

Innovations, Equipment and supplies, Scanning devices, Optical scanners, Quality control equipment

---

Selecting surface roughness parameters

Article Abstract:

Proper surface parameter selection used to be an easy task and usually only involved the use of the arithmetic mean roughness value (Ra). On several occassions, however, the Ra has proven to be an insufficient surface functionality predictor. Proper parameter selection for surface roughness can greatly enhance product quality and even reduce manufacturing costs. A table of roughness parameters is presented to guide the selection process.

Analysis, Parameter estimation

Similar abstracts:

• Abstracts: Keeping your charts under control. Measuring the internet. The education of a metrologist
• Abstracts: Listening to the voice of the employee. Improving team effectiveness. My process is too variable - now what do I do? How to produce and use a successful multi-vari study
• Abstracts: The genius is in the detail. Re-engineering Iraq. Multinationals on the move
• Abstracts: Cutting waste at the source. Why literacy is our problem
• Abstracts: Safety in the skies. TQM: flimsy footing or firm foundation?

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.