Surface measurement is becoming increasingly important to ensure proper performance of a manufactured product. Advanced surface measurement tools are not only beneficial in the manufacturing industry but also have unconventional applications.
Modern electronic height gages are computer-based, touchscreen-operated systems that enable automated measuring routines, error correction and multiple probe offsets, much like a CMM.
Understanding the differences between measurement methods means their discrepancies can be explained and used as an advantage to produce better correlation.
Measuring surface finish at the point of manufacture is often done by the same machinist who is manufacturing the part. They need tools that meet test requirements and are easy to use.
Modern digital comparators often combine the performance of touchscreen phones, LVDTs, digital amplifiers and even small PCs into the size of a standard dial indicator.
When measuring an ID with an indicating plug gage, it is OK to slow down to learn more about the hole being measured and explore for extraneous conditions.
2D measurement systems check specific lines for roughness quality, while a 3D surface analysis provides assurance for a broader area — which can avoid costly process disruptions and bonding failure.