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.
[citation needed] In gang edgers the saws remain stationary.
In a shifting edger the saws can move left or right independently of one another.
[dubious – discuss] This allows setting the saws to best maximize the product that can be produced from a particular cant.