Lumber edger
Encyclopedia
A lumber edger is a saw used to straighten and smooth rough lumber
Lumber
Lumber or timber is wood in any of its stages from felling through readiness for use as structural material for construction, or wood pulp for paper production....

 or bowed stock by making a cut along the sides of the boards. The result of this process is dimensional lumber.

In a saw mill the edger is next in line from the head saw
Head saw
A head saw, framesaw, gang saw or head rig, is the saw that makes the initial cuts in a log at a sawmill, turning a log into cants, or planks, of wood.-History:...

. The feed and press rollers on the edger are usually powered, passing the lumber through the machine. The length of feed and tables depends upon the lumber produced by the head saw.

Edgers can be categorized as gang or shifting edgers. In gang edgers the saws remain stationary. In a shifting edger the saws can move left or right independently of one another. This allows setting the saws to best maximize the product that can be produced from a particular cant
Cant (architecture)
Cant is the architectural term describing part, or segment, of a facade which is at an angle to another part of the same facade. The angle breaking the facade is less than a right angle thus enabling a canted facade to be viewed as, and remain, one composition.Canted facades are a typical of, but...

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