Optimizing Veneer Yield and Quality: A Comparison of Industrial and Laboratory Lathes

Veneer yield and quality data previously obtained for a production (8-ft.) lathe and a laboratory (4-ft.) lathe are shown to be comparable when peeling 1/10-inch Douglas-fir. The results of these previous tests demonstrated the necessity to maintain the horizontal gap/exit gap ratio (HG/EG) at 1.00 to achieve optimum veneer yield and thickness control. This was further demonstrated by peeling 5,500 blocks under production conditions using different lathes, species, and thicknesses. The necessary formulas and resulting working charts are provided to allow easy computation of the horizontal gap and the vertical gap necessary to maintain the HG/EG at 1.00.

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