Fly height compensation using temperature and non-repeatable runouts
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G11B-021/02
출원번호
US-0693415
(2007-03-29)
등록번호
US-7511914
(2009-03-31)
발명자
/ 주소
Hiller,Bernhard
LeFebvre,Andrew
Crimi,Francis
출원인 / 주소
Maxtor Corporation
대리인 / 주소
Westman, Champlin & Kelly P.A.
인용정보
피인용 횟수 :
15인용 특허 :
18
초록▼
A controller is provided having a circuit that uses non-repeatable run-out data and temperature data to provide a compensation for a fly height of a head. A disk drive may also be provided having a head for reading data from a disk, a thermistor, and a controller for controlling a fly height of the
A controller is provided having a circuit that uses non-repeatable run-out data and temperature data to provide a compensation for a fly height of a head. A disk drive may also be provided having a head for reading data from a disk, a thermistor, and a controller for controlling a fly height of the head based on temperature data obtained from the thermistor to refine a pressure determination. A method can include estimating a first pressure by the use of non-repeatable run-out data and temperature data corresponding to a disk drive.
대표청구항▼
What is claimed is: 1. A controller, comprising: an output terminal for operable connection to a fly height adjustment device; a circuit that uses non-repeatable run-out and temperature data to provide a compensation signal on the output terminal, to operatively control a fly height adjustment devi
What is claimed is: 1. A controller, comprising: an output terminal for operable connection to a fly height adjustment device; a circuit that uses non-repeatable run-out and temperature data to provide a compensation signal on the output terminal, to operatively control a fly height adjustment device for controlling a fly height of a head. 2. The controller of claim 1, further comprising a thermistor, wherein the temperature data is obtained from the thermistor. 3. The controller of claim 1, wherein the circuit estimates the first pressure and provides a compensation for a fly height of a head at each startup of the controller. 4. The controller of claim 1, further comprising an inner head, the inner head located at an outer diameter of a disk when the first pressure is estimated and the non-repeatable run-out data corresponding to the inner head. 5. The controller of claim 1, wherein the circuit estimates a first pressure in providing the compensation for a fly height of a head. 6. A disk drive, comprising a controller, as recited in claim 1, wherein the first pressure is within the disk drive. 7. The disk drive of claim 6, wherein P0 is a second pressure corresponding to the non-repeatable run-out data NRR0 and the temperature data T0 of a second condition of the disk drive, a proportionality constant C and slope corresponding to the disk drive, the first pressure P1 is determined by the equation: 8. The disk drive of claim 6, wherein, P0 is a second pressure corresponding to the non-repeatable run-out data NRR0 corresponding to the temperature data T0 of a second condition of the disk drive, the first pressure P1 is determined by the equation: 9. The controller of claim 1, wherein the circuit uses an ideal gas law to determine the first pressure. 10. The controller of claim 1, wherein the circuit estimates the first pressure having the non-repeatable run-out data corresponding to only a lateral arm mode. 11. The controller of claim 1, wherein the circuit estimates the first pressure having the non-repeatable run-out data corresponding to only a suspension mode. 12. The controller of claim 1, wherein the circuit estimates the first pressure having the non-repeatable run-out data corresponding to only frequencies above 10 kHz. 13. The controller of claim 1, wherein the circuit estimates the first pressure having the non-repeatable run-out data corresponding to seeks of more than 5 tracks. 14. The controller of claim 1, wherein the circuit estimates the first pressure and calculates an altitude based on the first pressure. 15. A disk drive, comprising: a disk having a surface provided with a plurality of tracks for storing data; a head for reading data from the disk; an actuator for positioning the head relative to the disk; and a controller comprising a circuit that uses non-repeatable run-out and temperature data to provide a compensation for a fly height of the head. 16. The disk drive of claim 15, wherein the head is an outer head located at an inner diameter of a disk when the first pressure is estimated, the non-repeatable run-out data corresponding to the outer head. 17. A method, comprising: estimating a first pressure P1 by the use of non-repeatable run-out data NRR1 and temperature data T1 corresponding to a disk drive; the method further comprising, before the act of estimating, determining P0, a second pressure corresponding to non-repeatable run-out data NRR0 and temperature data T0 of a calibration condition of the disk drive; wherein the first pressure P1 is determined by the equation: 18. A disk drive, comprising: a head for reading data from a disk; a thermistor; and a controller for controlling a fly height of the head based on temperature data obtained from the thermistor to refine a pressure determination; wherein the controller obtains the pressure determination based on non-repeatable run out data. 19. A method, comprising: providing a compensation signal based on non-repeatable run-out data and temperature data; and adjusting a fly height of a head in accordance with the compensation signal.
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이 특허에 인용된 특허 (18)
Hae-Joong Lee KR; Myung-Chan Jeong KR, Apparatus and method for providing axial control outside impact resistance of a hard disk drive to maintain a constant flying height of a head by control of a suspension.
Nishimura, Hideki; Oku, Yoshioto; Mori, Yasuhiro, Disk drive spindle motor with radial inward thrust area annular protruding portion and bearing member communicating passage.
Morehouse James H. (Jamestown CO) Furay David M. (Boulder CO) Alt Robert A. (Longmont CO) Emo Bruce D. (Niwot CO) Dunckley James A. (Boulder CO), Microminiature hard disk drive.
Morehouse James H. ; Andrews ; Jr. Thomas L. ; Counts Gary E. ; Volk Steven B. ; Utenick Michael R. ; Cowen Stephen R. ; Thompson Richard K., Microminiature hard disk drive with adaptive runout compensation.
Stupp, Steven; Blanco, Richard; Riener, Timothy A., Suspension assembly for supporting a read/write head over a rotating storage disk with dynamically adjustable fly height.
DiPerna, Paul M.; Brown, David; Rosinko, Mike; Kincade, Dan; Michaud, Michael; Nadworny, John; Kruse, Geoffrey A.; Ulrich, Thomas R., Infusion pump system with disposable cartridge having pressure venting and pressure feedback.
DiPerna, Paul M.; Brown, David; Rosinko, Mike; Kincade, Dan; Michaud, Michael; Nadworny, John; Kruse, Geoffrey A.; Ulrich, Thomas R., Infusion pump system with disposable cartridge having pressure venting and pressure feedback.
Verhoef, Erik T.; DiPerna, Paul M.; Rosinko, Mike; Williamson, Mark; Kruse, Geoffrey A.; Ulrich, Thomas R.; Lamb, Phil; Saint, Sean; Michaud, Michael; Trevaskis, William, Infusion pump system with disposable cartridge having pressure venting and pressure feedback.
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