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| Earlywood |
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The portion of the annual growth ring that is formed during the early part of the growing season. It is usually less dense and weaker mechanically than latewood.
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| Edger |
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A machine used to square-edge wany lumber and also to rip lumber. It consists of a frame supporting an arbor on which is mounted one to several saws and transmission gear.
View: Board Edger Examples
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| Edging |
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Trimming the width of a board of defects.
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| Efficiency |
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The ratio of output to input. Volumetric efficiency of a pump is the actual output in gpm divided by the theoretical or design output. The overall efficiency of a hydraulic system is the output power divided by the input power. Efficiency is usually expressed as a percent.
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| Electro-hydraulic servo valve |
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A directional type valve which receives a variable or controlled electrical signal and which controls or meters hydraulic flow.
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| Encoder |
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Device attached to a moving chain that produces an electrical signal each time the chain moves a fixed distance. The encoder is attached to the chain and used to track the movement of the pieces through a scanner.
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| Energy |
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The ability or capacity to do work. Measured in units of work.
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| Engineered wood products |
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A composite wood product using glued fiber, lumber and/or veneer to meet specific design criteria. Such products include laminated veneer lumber (LVL), parallel strand lumber (PSL), and structural I-beams. Products under development include various molded, extruded, and other structural and non-structural composites. Although engineered wood products have a number of advantages over solid lumber (including the ability to make large-sized members from small diameter trees), engineered wood products are more costly to produce than lumber and require the use of more energy to manufacture.
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| Entering air control |
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Sensing and controlling drybulb temperatures of heated kiln air as it enters the lumber load.
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| Equalization |
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The process of narrowing the moisture distribution between boards at the end of a drying charge.
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| Equilibrium moisture content (EMC) |
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The moisture content at which wood neither gains nor loses moisture when surrounded by air at a given relative humidity and temperature.
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| Error (signal) |
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The signal which is the albraic summation of an input signal and a feedback signal.
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| Evaporate |
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Changing water from a liquid to a vapor form.
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| Excess air |
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Refers to the quantity of air supplied that exceeds the minimum necessary to support the combustion chemistry.
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| Exiting air control |
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Sensing and controlling drybulb temperatures of heated dry kiln air as it leaves the lumber load.
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| Expansion factor |
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With respect to chips, bark, sawdust, and shavings, the ratio of volume occupied in one of these forms to the volume of solid wood before conversion.
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| Extractive |
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Substances in wood, not an integral part of the cellular structure, that can be removed by solution in hot or cold water, ether, benzene, or other solvents that do not react chemically with wood components.
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| Eye |
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The hole in the center of a circular saw blade so it can be fitted on the arbor.
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