Scan type laser marking device including a scanning speed setting device

Abstract

A scan type laser marking device which scans the surface of an object conveyed in a predetermined area and applies a laser beam to the surface of the object to form a mark on the surface of the object, comprising an area storing section for storing the area; a start point coordinate storing section for storing coordinates of an irradiation start point in the area, the irradiation start point being located upstream relating to the direction of conveyance of the object; an end point coordinate storing section for storing coordinates of an irradiation end point in the area, the irradiation being located downstream relating to the direction of conveyance of the object; a mark reference point section for storing the coordinates of a reference point on the mark; and speed setting mechanism for setting scanning speeds so that a marking operation is started when the mark reference point reaches the irradiation start point, and is ended when the mark reference point reaches the irradiation end point.