With the door frame and the horizontal length of the planer bed. Planer is mainly used for planing large parts, but also on the bench setup process multiple parts at the same time, the industry of machine tools. Planer of the table with the workpiece through the door frame for linear reciprocating motion, and air travel faster than the working stroke speed. Generally equipped with two vertical beams on the turret, turret slide in a vertical plane rotation angle, and feed along the beam for lateral movement; planer knife can make vertical or diagonal feed motion; beams can be adjusted up and down on the two columns. Usually in two columns along the column can be also installed on the side of the knife up and down movement to expand the range of processing the return when motorized lift table knife, so as not to scratch the surface.