Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Patent
1996-08-21
1998-06-30
Hindi, Nabil
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
360106, G11B 2102
Patent
active
057742944
ABSTRACT:
A servo track writer used for the writing of servo information to a head disc assembly, the servo track writer including a tuned damper as part of a pusher block assembly, the tuned damper reducing the effects of errors in the written servo information as a result of resonant frequencies induced in the pusher block assembly. The pusher block assembly mechanically advances an actuator of the head disc assembly, the actuator including a head which selectively magnetizes portions of a rotating disc of the head disc assembly to write the servo information. The tuned damper portion of the pusher block assembly comprises a dampening block having a selected mass and a dampening pad comprising a layer of compliant material, the dampening pad isolating the dampening block from the rest of the pusher block assembly. The desired resonant frequency response of the pusher block assembly is achieved through selection of the mass of the dampening block and the compliance of the dampening pad.
REFERENCES:
patent: 5014146 (1991-05-01), Takatsuka et al.
patent: 5164863 (1992-11-01), Janz
patent: 5231556 (1993-07-01), Blanks
patent: 5241430 (1993-08-01), Janz
patent: 5262907 (1993-11-01), Duffy et al.
patent: 5661615 (1997-08-01), Waugh et al.
Heller III Edward P.
Hindi Nabil
McCarthy Bill D.
McCarthy Randall K.
Seagate Technology Inc.
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