• Economics of sawing variation and potential gains in lumber recovery using thin kerf accurate sawing and sawing options to improve profits


• Wood characteristics and properties which are of concern when sawing – video on rupture patterns in cutting wood

• Tensile strength, hardness, thermal expansion
• Stainless steel and variable thickness designs
• Circular saw designs and saw noise
• Saw blade coatings, chrome plating and lubrication

• Sources of saw vibration, vibration modes and associated natural frequencies - video
• CSAW computer program for calculating critical and supercritical speeds and predicting operating speeds for circular saws
• Instability mechanism of band saws including causes of washboarding
• High speed band mills and active saw guides

• Thermal and tensioning stresses
• Rotational stresses in circular saws, saw stiffness and stability

• New approaches to saw tooth and gullet design
• Industrial experience with variable pitch (saw tooth spacing)
• Effect of side clearance on guided saw cutting accuracy

• Wear mechanisms during sawing of wood and wood based products
• Saw tooth tipping with a new grades of Stellite, tungsten carbide, cermet materials and PCD tips
• Saw tip failure and gullet cracks analysis and how to avoid them

• Saw blade speed and optimum rate of sawing for band saws as well as single and double arbor circular gang saws

• Blade-guide interaction - single and multiple pairs of guides
• Shape and size considerations and lubrication aspects
• Overview of design developments for circular saw arbors

• On-line control of saw vibration and stability
• Computerized on-line band saw monitoring systems for increased productivity
• Double arbor gang edger’s feed rates and control of mismatch
• On- line Lumber Size Control Using SizeCheck® Program

• Saw tensioning methods and its control
• Band saw tracking: The effect of saw tensioning, back crown and strain

• Saw tipping and grinding: problems and solutions
• Sources of band saw cracks and how to avoid them
• Machinery maintenance problems relevant to sawing on primary and secondary equipment
• Saw tracking and management software

• Review of causes of several accidents in sawmills and how they could have been avoided

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Wood Machining Institute
P.O. Box 476
Berkeley, CA 94701 USA
Tel: 1-925-943-5240; Fax: 1-925-945-0947
e-mail: szymani@woodmachining.com
www.woodmachining.com