Development of a Permanent Magnet as Magnetizer for Linear Magnetic Pattern Manufacturing

An energy saving permanent magnet type magnetizer is proposed, examined, and validated in this paper for the manufacturing of linear pattered magnetic medium for the precision control application. With the ultimate goal placed on providing sufficient magnetic field to overwrite and modify patterns on the magnetic media, parameter studies are conducted through finite element studies with results validated by magnetic flux density distribution measurements from produced incremental and index point patterns. Feasibility of utilizing the patterned medium for positioning control is validated through repeatability measurements, indicating that the proposed magnetizer can produce magnetic patterns rendering adequate magnetic signal strength and repeatability in linear precision control applications.