Abstract
No recommendation was found in the literature with regard to which measuring resolution should be used when measuring wood surfaces and requirements in the general standard ISO 3274 (1996) appear too stringent. Due to its variability, wood requires longer evaluation length than recommended by ISO 4288 (1996) and combined with a high resolution will increase the matrix of data and so the time for scanning and data processing. A study was conducted on roughness profiles from sanded surfaces of oak, beech and spruce measured at different resolutions to see which is the lowest resolution that still allows accurate evaluation of the roughness parameters in real time. The effect of decreasing the resolution on roughness parameters was examined as compared with a resolution of 1 μm, which was taken as a reference. Results showed that a measuring resolution of 5 μm seems reliable for all species sanded with common grit sizes.
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