An Analysis of Sawing Variation By Machine Type

Knowledge of the relative sawing accuracy of sawmill equipment is necessary for optimum design, maintenance, and management of sawmills. Low sawing variation can translate to increased lumber volume recovery and greater financial returns to the sawmill enterprise. This study analyzed the relative sawing accuracies of 402 machines grouped into 17 machine types. The data for this analysis were from Sawmill Improvement Program studies at 154 sawmills. Machines with low within-board sawing variation had fences and/or horizontal feedrolls for guiding flat-faced cants and had small diameter circular or sash gangsaws. Lowest between-board variation was observed for machines with preset or single shifting saws. Double arbor and single arbor gangsaws performed with the lowest total sawing variation.

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