[go: up one dir, main page]

BR8106502A - Melhoramentos em aparelho e metodo de servocontrole de posicao amostrados - Google Patents

Melhoramentos em aparelho e metodo de servocontrole de posicao amostrados

Info

Publication number
BR8106502A
BR8106502A BR8106502A BR8106502A BR8106502A BR 8106502 A BR8106502 A BR 8106502A BR 8106502 A BR8106502 A BR 8106502A BR 8106502 A BR8106502 A BR 8106502A BR 8106502 A BR8106502 A BR 8106502A
Authority
BR
Brazil
Prior art keywords
control method
service control
positioned service
service
control
Prior art date
Application number
BR8106502A
Other languages
English (en)
Inventor
W Case
C Wallis
Original Assignee
Ibm
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ibm filed Critical Ibm
Publication of BR8106502A publication Critical patent/BR8106502A/pt

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B5/596—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on disks
    • G11B5/59633—Servo formatting
BR8106502A 1980-10-29 1981-10-08 Melhoramentos em aparelho e metodo de servocontrole de posicao amostrados BR8106502A (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP80303849A EP0050695A1 (en) 1980-10-29 1980-10-29 Improvements in sampled servo position control systems

Publications (1)

Publication Number Publication Date
BR8106502A true BR8106502A (pt) 1982-06-29

Family

ID=8187284

Family Applications (1)

Application Number Title Priority Date Filing Date
BR8106502A BR8106502A (pt) 1980-10-29 1981-10-08 Melhoramentos em aparelho e metodo de servocontrole de posicao amostrados

Country Status (4)

Country Link
US (1) US4412165A (pt)
EP (1) EP0050695A1 (pt)
JP (1) JPS5778679A (pt)
BR (1) BR8106502A (pt)

Families Citing this family (41)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3120327A1 (de) 1981-05-22 1982-12-09 Ibm Deutschland Gmbh, 7000 Stuttgart Verfahren und anordnung zum kompensieren von signaleinbruechen in von magnetischen aufzeichnungstraegern gelesenen signalen
DE3268189D1 (en) * 1981-12-11 1986-02-06 Burroughs Corp Improvements in and relating to differential signal decoders
US4665353A (en) * 1984-10-04 1987-05-12 Pitney Bowes Inc. Microprocessor controlled D.C. motor for controlling tape feeding means
JPS61104378A (ja) * 1984-10-24 1986-05-22 Hitachi Ltd デ−タ記録装置
JP2581663B2 (ja) * 1985-05-02 1997-02-12 株式会社日立製作所 光ディスク
US4688118A (en) * 1986-07-01 1987-08-18 Hewlett-Packard Company Servo gain compensation in a disc drive
US4740736A (en) * 1986-07-10 1988-04-26 Advanced Micro Devices, Inc. Servo data decoder for any amplitude dependent servo data encoding scheme
US4724370A (en) * 1986-10-14 1988-02-09 Konishiroku Photo Industries Co., Ltd. Servo system for a disk drive
US4823212A (en) * 1986-11-26 1989-04-18 Hewlett-Packard Company Sampled servo code format and system for a disc drive
DE3853484T2 (de) * 1987-01-13 1995-12-07 Nippon Electric Co Spurverfolgung-Kontrollsystem für magnetische Platteneinheit.
FR2615995A1 (fr) * 1987-05-27 1988-12-02 Bull Sa Mode d'ecriture d'informations sur un support d'enregistrement magnetique
JP2551043B2 (ja) * 1987-10-31 1996-11-06 ソニー株式会社 トラッキング制御装置
JPH01237987A (ja) * 1988-03-17 1989-09-22 Hitachi Ltd ディスク装置の制御方式
US5111349A (en) * 1989-02-07 1992-05-05 Alps Electric (Usa), Inc. Digital servo system for moving body by a distance equal to an integral multiple of a predetermined pitch
DE69033834T2 (de) * 1989-07-13 2002-04-25 Canon K.K., Tokio/Tokyo Für das Kopieren von Daten geeignete Kodierungs- und Dekodierungsvorrichtung
WO1993000677A1 (en) * 1991-06-26 1993-01-07 Maxtor Method and apparatus for detecting data track misregistration
US5710677A (en) * 1995-12-18 1998-01-20 Seagate Technology, Inc. Method of detecting and isolating defective servo bursts
US5793559A (en) * 1996-02-27 1998-08-11 Quantum Corporation In drive correction of servo pattern errors
US5880902A (en) * 1996-04-09 1999-03-09 International Business Machines Corporation Method and apparatus for adaptively calibrating disk drive performance based on real time performance monitoring
US6067204A (en) * 1996-06-03 2000-05-23 Seagate Technology, Inc. Disc drive servo pattern insensitive to read head
KR100189532B1 (ko) * 1996-06-24 1999-06-01 윤종용 하드 디스크 드라이브의 위치 에러신호 제어방법
US5875066A (en) * 1996-12-13 1999-02-23 International Business Machines Corporation Method and apparatus for real-time filtering of a position error signal for a disk drive servo system
US6078461A (en) * 1997-06-12 2000-06-20 International Business Machines Corporation In situ offset correction for position error signal
US6115203A (en) * 1998-01-30 2000-09-05 Maxtor Corporation Efficient drive-level estimation of written-in servo position error
US6292324B1 (en) 1998-01-30 2001-09-18 Maxtor Corporation Disk drive with compensation values calculated using a non-causal impulse response
US6078452A (en) * 1998-06-22 2000-06-20 Western Digital Corporation Disk drive employing method of writing a data block to a data sector following a defective servo sector
DE10084258T1 (de) * 1999-02-22 2002-02-14 Seagate Technology Llc Suchwiederherstellung mit unterschiedlichen Servoimpulsdatenqualifikations-Betriebsarten
US6754032B1 (en) * 1999-10-22 2004-06-22 Seagate Tech. Llc Method and system for radial and circumferential alignment of data tracks on patterned media
US6643090B1 (en) 2000-03-30 2003-11-04 Seagate Technology Llc Multi-mode servo position error signal demodulator circuit
US6671119B2 (en) 2000-04-18 2003-12-30 Seagate Technology Llc Method and apparatus to encode position error signal correction information
US6549362B1 (en) 2000-06-09 2003-04-15 Maxtor Corporation Method and apparatus for the enhancement of embedded runout correction in a disk drive
US6947249B1 (en) * 2000-12-20 2005-09-20 Maxtor Corporation Method and apparatus for automatically determining an embedded runout correction threshold
US7106542B1 (en) 2001-12-11 2006-09-12 Maxtor Corporation Method and apparatus for determining embedded runout correction values when self-servo writing or partial self-servo writing a disk drive
US7106547B1 (en) 2001-12-11 2006-09-12 Maxtor Corporation Method and apparatus for determining embedded runout correction values using feedback
US7054096B1 (en) 2002-01-04 2006-05-30 Maxtor Corporation Method and apparatus for determining embedded runout correction values
AU2003259433A1 (en) * 2002-09-11 2004-04-30 Koninklijke Philips Electronics N.V. Data carrier, apparatus for processing said data and method for detecting angle information for commutation of the motor.
US6950265B2 (en) * 2002-10-16 2005-09-27 International Business Machines Corporation Method and apparatus for servo defect management
US6917483B2 (en) * 2003-09-02 2005-07-12 Seagate Technology Llc Non-consecutive transitional mechanism for seek operations when transitioning from a seek control to a track following control
US7787209B1 (en) 2005-03-16 2010-08-31 Maxtor Corporation Method and apparatus for compensating for repeatable runout using wide embedded runout correction fields
US7477473B2 (en) * 2006-01-18 2009-01-13 Maxtor Corporation Servo positioning adjustment
US9286927B1 (en) * 2014-12-16 2016-03-15 Western Digital Technologies, Inc. Data storage device demodulating servo burst by computing slope of intermediate integration points

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3555524A (en) * 1966-08-10 1971-01-12 Evgeny Ivanovich Ilyashenko Magnetic logical memory device
GB1312504A (en) * 1970-05-20 1973-04-04 Ibm Control unit for serial data storage apparatus
JPS51144212A (en) * 1975-06-05 1976-12-11 Toshiba Corp Head access system of magnetic disc device
GB1499268A (en) * 1976-06-30 1978-01-25 Ibm Servo apparatus
US4168457A (en) * 1977-12-29 1979-09-18 Sperry Rand Corporation Self adaptive speed control system
US4208679A (en) * 1978-02-28 1980-06-17 Digital Equipment Corporation Transducer positioning system for rotating disk drive units

Also Published As

Publication number Publication date
EP0050695A1 (en) 1982-05-05
US4412165A (en) 1983-10-25
JPS5778679A (en) 1982-05-17

Similar Documents

Publication Publication Date Title
BR8106502A (pt) Melhoramentos em aparelho e metodo de servocontrole de posicao amostrados
JPS56167793A (en) Waste fuel manufactuing method and device
GB2078948B (en) Defect detecting method and device
JPS5742325A (en) Mixing method and mixing device
HK13387A (en) Verifying method and device
JPS572068A (en) Developing method and device
NO156146C (no) Avfoelingsinnretning og apparat for overvaakning av korrosjon.
JPS576501A (en) Current controlling method and device
JPS5686002A (en) System control method and device
ES557008A0 (es) Perfeccionamientos en un aparato reorientador de objetos
JPS572065A (en) Developing method and device
JPS56133731A (en) Device and method for matching original
DE3582353D1 (de) Apparat mit vakuum-zu-vakuum-zugangseinrichtung.
JPS5714461A (en) Welding method and welding device
JPS56162759A (en) Copying method and device
JPS56165091A (en) Dehydrating device and method
DE3160459D1 (en) Method and device for evaluating visibility
JPS56126198A (en) Marking method and its device
MX149443A (es) Mejoras en dispositivo electrico de control
JPS56147646A (en) Field flowing dividing method and its device
JPS5715908A (en) Cutting method and its device
JPS56129115A (en) Slicing method and its device
JPS56100276A (en) Airrconditioning method and its device
JPS5725507A (en) Clamp device and its using method
JPS56141887A (en) Washing method and its device