Wood grain machine and control method thereof

The invention discloses a wood grain machine. The wood grain machine comprises a wood grain machine body; the wood grain machine body is provided with a main control module, a frequency converter, anencoder, a printing pattern roller, and a driving mechanism for driving the printing pattern roller to move up and down; the frequency converter is electrically connected with the main control moduleand the driving mechanism; and the encoder is electrically connected with the main control module for setting an upper initial position and a lower ending position of the up-down motion of the printing pattern roller. The wood grain machine can use the encoder for precise positioning, so that the printing pattern roller can perform positioned printing on workpieces of any profiles; and in the design, the printing process is performed from top to bottom, and a vertical printing mode is adopted, so that the linear speed of the printing operation is accelerated, and the working efficiency is improved.