.A head module for 3D printer comprising polygon mirrors rotating in single direction with a function of controlling the size of a beam spot and a scanning method therewith and a 3D printer therewith

摘要

The present invention relates to a head device for three-dimensional molding devices, which has a unidirectionally rotating polygon mirror, capable of conducting high speed biaxial scanning operations, and increases precision in molding operations. The present invention further relates to a scanning method for molding plane (10) using the same. To this end, the head device for three-dimensional molding devices comprises a molding light source part (15), a first light guide part (20), a second light guide part (30), a beam spot size adjustment optical module (50), and a control part (40).