| 摘要 |
PURPOSE:To obtain a small and highly accurate magnetic encoder by arranging a flying head incorporating a magnetic resistance effect element facing a magnetic scale formed on a substrate and an inclination detector for detecting the inclination thereof. CONSTITUTION:A flying head 6 incorporating a magnetic resistance effect elemet 7 levitates by a fixed value from the surface of a magnetic medium 3 on an air current following the rotation of a substrate 2. Under such a condition, an element 7 reads a magnetized pattern 4 written into the magnetic medium 3 to detect the revolutions and the angle of rotation of a rotating shaft 1. The direction of rotation thereof is detected with an inclination detector 12 provided on the flying head 6. |
