Measuring Wood Surface Smoothness: A Proposed Method

A precise method for measuring wood smoothness would be useful in research as well as manufacturing quality control. Stylus tracing seemed the most suitable and a device developed that was tailored to the requirements of wood surfaces. A 0.001-inch-radius stylus with a contact force of 1.5 grams was used, and stylus movement detected by a LVDT transducer. Through suitable amplification, roughnesses of from 0.001 inch to 0.25 inch were measured. Typical traces for surfaces varying from rough-sawn to smooth-sanded are shown.

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