公开(公告)号：DE3680667D1

公开(公告)日：1991-09-05

申请号：DE3680667

申请日：1986-05-23

Applicant: IBM

Inventor： COOPER ROGER ANTHONY ,  HEARN ANTHONY ROGER ,  CASTLE FRANK ERIC

IPC: G11B21/02 ,  G11B5/54 ,  G11B5/55

Abstract: Head/arm assembly and rotary access mechanism for a disk file comprises (a) at least one planar cantilever arm (10) for supporting a transducing head (31) at or near its free end; (b) a counterweight (50); (c) an attachment means (51,54) for attaching the counterweight (50) at the opposite end of the arm (10) so that the head/arm assembly is balanced under predetermined conditions about an axis (70) through the assembly perpendicular to the plane of the arm (10); and (d) locating means (43,44,45) for locating the head/arm assembly on a rotary actuator (80) with the axis coincident with the axis of rotatkion of the actuator (80), the actuator being subject to inherent torsional resonances about its axis of rotation; the head/arm assembly being such that (e) the attachment means includes a resilient connection (54) for at least a portion (52) of the counterweight (50) such that the resiliently supported portion (52) acts as an auxiliary mass damper tuned relative to the fundamental resonant frequency of torsional oscillation of the rotary actuator (80).