Rotary cutting machine is one of the main equipment for producing veneer, and in a sense, it is more widely used than planing machine. Rotary cutting machines can be divided into concentric rotary cutting and eccentric rotary cutting according to whether the wood segment rotates around its own axis. The concentric rotary cutting machine is divided into two types: card shaft rotary cutting machine and non card shaft rotary cutting machine. Eccentric rotary cutting can obtain beautiful radial patterns, but the productivity is lower than concentric rotary cutting. Rotary cutting machines are generally large in size and complex in structure. Before being installed, the logs need to be centered. If the centering is not accurate, intermittent veneer strips or narrow veneers will be spun out when starting rotary cutting. The more broken or narrow veneers there are, the more good edge veneers will be lost, which is not conducive to the continuity of production. The veneers that are prone to spinning out due to bending, irregular cross-section, and sharp ends (such as sharpness) of logs are called broken veneers, which waste wood. And when the diameter of the log decreases to a certain extent, it cannot be further cut by rotary cutting (i.e. the remaining wood core causes wood waste). The wood planer is the main equipment for producing veneer and thin wood. According to the direction of movement of the planer relative to the horizontal plane, wood planers can be classified into two categories: vertical and horizontal; According to whether the cutting direction is perpendicular or parallel to the length direction of the wood fiber, the cutting machine can be divided into transverse cutting machine and longitudinal cutting machine. The external dimensions of modern planers are only one-third of those of previous planers, with compact structure, light weight, and easy installation and debugging; Can be produced continuously, saving time for loading wood and achieving high production efficiency; The work is extremely smooth,