Determination of position of drop out for magnetic disc and inspection thereof

Abstract

Abstract PURPOSE: To quickly inspect a magnetic tape for dropout by detecting the angle and location in the radial direction of a dropout on a magnetic disk and positioning a disk inspection equipment to an inspecting position based on the detected information. CONSTITUTION: A disk guaranteeing device 12 controlled by a computer 14 scans each track of a magnetic disk and, when the device 12 detects a dropout, interrupts the computer 14 and discriminates the shape of the dropout, the dropout occurring surface of the disk, and the track location. The computer 14 calculates the angle and location in the radial direction of the dropout through an interface composed of a counter 16, a clock 18, and a memory 20 and sends a necessary control signal to a positioning table 22. The dropout can be inspected quickly by positioning the objective defect in the visual field of disk inspection equipment, such as the optical microscope 24, etc., by rotating the table 22.

Inventors

• 👤 Supuratsuto Fuaunten Furanku
• 👤 Kaaku Pusei Donarudo

Bibliographic Details