Dynamics of guided circular saws

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Canada's lumber processing industry is a vital contributor to the health of the Canadian economy. In order to maintain its ability to complete in the international market it must continually improve the efficiency with which logs are processed into sawn lumber. Two principal factors must be addressed: the need to minimize the amount of wood lost in saw dust, and the need to increase the speed with which a given log can be converted into sawn boards.The present research addresses both these isssues. One the one hand research is being conducted into the use of thinner circular saws than have been traditionally used (in order to reduce wastage due to the thickness of the cut); and on the other hand investigations are being conducted into increasing the speed that saws can be operated at (in order to increase the speed that the wood can be fed through the saw).Difficulties arise both in using saws that are too thin and in running saws too fast. In such circumstances the blade may deviate excessively and thus cause excessive waste when planed to the required dimensions. The work being conducted seeks to understand the cause of such behaviour through experimental testing and computer modeling.The results of laboratory and computer testing will lead to new sawing configurations that will be verified by detailed testing in saw mills.