公开(公告)号：JPH08124287A

公开(公告)日：1996-05-17

申请号：JP26513094

申请日：1994-10-28

Applicant: IBM

Inventor： SATO KIYOSHI ,  SASAKI MASAKAZU ,  KITABORI HIRONORI ,  NEMOTO SUNAO ,  DEEBITSUDO ARUBUREHITO ,  GUREGORII FURIIZU

IPC: G11B19/20 ,  G11B25/04 ,  G11B33/08 ,  G11B33/12 ,  H02K7/08

Abstract: PURPOSE: To equalize the coupled resonance frequency of a hard disc drive at the time of loading one magnetic disc and two magnetic discs based on the parameters of a model. CONSTITUTION: Assuming the spring coefficient of a spindle motor is Kp and the mass thereof is Mp, while the spring coefficient of a magnetic disc is Kd and the mass thereof is Md, a disc drive is modeled by a coupled vibration model (A) of a linear two degree of a freedom system for a case (B) loaded with a single disc and a case (C) loaded with two discs. The spring coefficient Kp of the spindle motor, i.e., the components, are then adjusted such that the coupled resonance frequency of the spindle motor and the disc is substantially constant for the case loaded with a single disc and the case loaded with two discs. According to the arrangement, stabilized track follow can be ensured without requiring any additional disc.