CA2413132A1 - Method and position control for a servo system for positioning a head laterally with respect to defined servo tracks - Google Patents
Method and position control for a servo system for positioning a head laterally with respect to defined servo tracks Download PDFInfo
- Publication number
- CA2413132A1 CA2413132A1 CA002413132A CA2413132A CA2413132A1 CA 2413132 A1 CA2413132 A1 CA 2413132A1 CA 002413132 A CA002413132 A CA 002413132A CA 2413132 A CA2413132 A CA 2413132A CA 2413132 A1 CA2413132 A1 CA 2413132A1
- Authority
- CA
- Canada
- Prior art keywords
- servo
- actuator portion
- position control
- respect
- positioning
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
- 150000001875 compounds Chemical class 0.000 abstract 1
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
-
- 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
- G11B5/584—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 tapes
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B21/00—Head arrangements not specific to the method of recording or reproducing
- G11B21/02—Driving or moving of heads
- G11B21/08—Track changing or selecting during transducing operation
- G11B21/081—Access to indexed tracks or parts of continuous track
- G11B21/086—Access to indexed tracks or parts of continuous track on tapes
- G11B21/088—Access to indexed tracks or parts of continuous track on tapes with track following of accessed part
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B21/00—Head arrangements not specific to the method of recording or reproducing
- G11B21/02—Driving or moving of heads
- G11B21/10—Track finding or aligning by moving the head ; Provisions for maintaining alignment of the head relative to the track during transducing operation, i.e. track following
- G11B21/103—Track finding or aligning by moving the head ; Provisions for maintaining alignment of the head relative to the track during transducing operation, i.e. track following on tapes
-
- 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
- G11B5/54—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 into or out of its operative position or across tracks
- G11B5/55—Track change, selection or acquisition by displacement of the head
- G11B5/5504—Track change, selection or acquisition by displacement of the head across tape tracks
- G11B5/5508—Control circuits therefor
Abstract
A method and position control for a servo system for positioning a head laterally with respect to defined servo tracks. The servo system comprises a servo sensor and detector (115) for sensing lateral position of the head (15) and a compound actuator (14) having a fine actuator portion (20) and a coarse actuator portion (16). The position control (116) provides position indications for the coarse actuator portion (16), which may comprise a table relating predetermined nominal lateral position indications to the defined servo tracks. The position control (116) positions the coarse actuator portion (16) at an estimated position with respect to the defined servo tracks, and responds to the servo sensor to determine which servo track is closest to the estimated position. The position control (116) sets the coarse actuator portion (16) position indication to the predetermined nominal lateral position indication of the closest defined servo track, e.g., by looking it up in the table. This thereby corrects the indication of the position of the coarse actuator portion (16).
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/641,135 | 2000-08-16 | ||
US09/641,135 US6721126B1 (en) | 2000-08-16 | 2000-08-16 | Position identification for a coarse actuator portion of a compound actuator |
PCT/GB2001/003063 WO2002015173A1 (en) | 2000-08-16 | 2001-07-06 | Method and position control for a servo system for positioning a head laterally with respect to defined servo tracks |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2413132A1 true CA2413132A1 (en) | 2002-02-21 |
CA2413132C CA2413132C (en) | 2006-09-19 |
Family
ID=24571082
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002413132A Expired - Lifetime CA2413132C (en) | 2000-08-16 | 2001-07-06 | Method and position control for a servo system for positioning a head laterally with respect to defined servo tracks |
Country Status (11)
Country | Link |
---|---|
US (1) | US6721126B1 (en) |
EP (1) | EP1309967B1 (en) |
JP (1) | JP4068959B2 (en) |
KR (1) | KR100523704B1 (en) |
CN (1) | CN1207701C (en) |
AT (1) | ATE275752T1 (en) |
AU (1) | AU2001269303A1 (en) |
CA (1) | CA2413132C (en) |
DE (1) | DE60105436T2 (en) |
MY (1) | MY134153A (en) |
WO (1) | WO2002015173A1 (en) |
Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6269533B2 (en) * | 1999-02-23 | 2001-08-07 | Advanced Research Corporation | Method of making a patterned magnetic recording head |
US7773340B2 (en) * | 1999-02-23 | 2010-08-10 | Advanced Research Corporation | Patterned magnetic recording head having a gap pattern with substantially elliptical or substantially diamond-shaped termination pattern |
US6496328B1 (en) * | 1999-12-30 | 2002-12-17 | Advanced Research Corporation | Low inductance, ferrite sub-gap substrate structure for surface film magnetic recording heads |
US7038877B2 (en) * | 2003-03-12 | 2006-05-02 | Matsushita Electric Idustrial Co., Ltd. | Head positioning apparatus |
US7106544B2 (en) * | 2003-05-09 | 2006-09-12 | Advanced Research Corporation | Servo systems, servo heads, servo patterns for data storage especially for reading, writing, and recording in magnetic recording tape |
US7142381B2 (en) * | 2003-11-10 | 2006-11-28 | Imation Corp. | Servo writing devices for creating servo patterns with inherent track ID |
US7038872B2 (en) * | 2003-11-10 | 2006-05-02 | Imation Corp. | Servo patterns with inherent track ID |
US7038871B2 (en) * | 2003-11-10 | 2006-05-02 | Imation Corp. | Multi-band servo patterns with inherent track ID |
US7133261B2 (en) * | 2003-12-17 | 2006-11-07 | International Business Machines Corporation | Tape head having a support plate with contoured surface |
US8144424B2 (en) | 2003-12-19 | 2012-03-27 | Dugas Matthew P | Timing-based servo verify head and magnetic media made therewith |
US7283317B2 (en) * | 2004-01-30 | 2007-10-16 | Advanced Research Corporation | Apparatuses and methods for pre-erasing during manufacture of magnetic tape |
US20100321824A1 (en) * | 2004-02-18 | 2010-12-23 | Dugas Matthew P | Magnetic recording head having secondary sub-gaps |
US7450341B2 (en) * | 2004-05-04 | 2008-11-11 | Advanced Research Corporation | Intergrated thin film subgap subpole structure for arbitrary gap pattern magnetic recording heads and method of making the same |
US7158338B2 (en) * | 2004-05-24 | 2007-01-02 | Quantum Corporation | Servo track having periodic frames of tone field and embedded synchronization marks |
US7362525B2 (en) * | 2005-07-22 | 2008-04-22 | Quantum Corporation | PRML based magnetic servo position demodulator |
US7307809B2 (en) * | 2005-08-18 | 2007-12-11 | Quantum Corporation | Correlation servo for positioning recording head |
US7428118B2 (en) * | 2005-11-28 | 2008-09-23 | Quantum Corporation | LTM compensation methods and systems for magnetic servo writing |
WO2009094516A1 (en) * | 2008-01-23 | 2009-07-30 | Advanced Research Corporation | Recording heads with embedded tape guides and magnetic media made by such recording heads |
US8068300B2 (en) * | 2008-03-28 | 2011-11-29 | Advanced Research Corporation | Thin film planar arbitrary gap pattern magnetic head |
WO2011014836A2 (en) * | 2009-07-31 | 2011-02-03 | Advanced Research Corporation | Erase drive systems and methods of erasure for tape data cartridge |
US8027121B2 (en) * | 2009-11-04 | 2011-09-27 | International Business Machines Corporation | Positioning coarse servo actuator of tape servo system to allow fine servo actuator to follow tape shift excursions |
US8059362B2 (en) * | 2010-03-02 | 2011-11-15 | International Business Machines Corporation | Positioning a coarse actuator of compound actuator tape servo system at midpoint of maximum peaks of lateral tape movement |
Family Cites Families (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5121270A (en) | 1989-09-19 | 1992-06-09 | Alcudia Ezra R | Multitransducer head positioning servo for use in a bi-directional magnetic tape system |
US5726824A (en) | 1991-12-10 | 1998-03-10 | Exabyte Corporation | Head positioning in a multi-track magnetic tape recorder/player |
EP0565918B1 (en) | 1992-04-13 | 1998-05-20 | Imation Corp. | Head positioning mechanism for multitrack tape recorder |
US5949604A (en) | 1992-06-24 | 1999-09-07 | Quantum Corporation | Method of writing and reading servo on tracks having a longitudinal gap |
US5689384A (en) | 1994-06-30 | 1997-11-18 | International Business Machines Corporation | Timing based servo system for magnetic tape systems |
US5793573A (en) | 1995-06-07 | 1998-08-11 | International Business Machines Corporation | Hybrid actuator servo actuated tape drive having a pivotally mounted motion transmission member |
US5644453A (en) | 1995-06-07 | 1997-07-01 | International Business Machines Corporation | Tape drive actuator including a one piece internally pre-loaded linear bearing |
US5726834A (en) * | 1995-06-07 | 1998-03-10 | International Business Machines Corporation | Actuator for servo actuated tape drive |
US5710681A (en) | 1995-06-07 | 1998-01-20 | International Business Machines Corporation | Pivot bearing having no moving parts for use in a high density data tape drive |
US5852535A (en) | 1996-02-29 | 1998-12-22 | Hewlett-Packard Company | Accurate measurement of preformatted track servo patterns by a magnetic data tape drive |
US5946159A (en) | 1996-11-27 | 1999-08-31 | International Business Machines Corporation | Servo edge correction using edge samples taken by independently positioned servo elements |
US5946156A (en) | 1997-03-04 | 1999-08-31 | Imation Corp. | Tape servo system and methods, write/read heads, and servo track configurations regarding same |
US5982711A (en) | 1997-06-05 | 1999-11-09 | Hewlett-Packard Co. | Device for reading data from or writing data to magnetic storage media and a method of positioning a tape head relative to the magnetic storage media |
US6078476A (en) * | 1997-12-17 | 2000-06-20 | Texas Instruments Incorporated | Twin head design for micro-actuator position sensing in a hard disk drive |
KR100518514B1 (en) * | 1998-02-20 | 2005-11-24 | 삼성전자주식회사 | Actuator on-track control device and method in hard disk drive |
US6075678A (en) * | 1998-03-24 | 2000-06-13 | Quantum Corporation | Pivoting lever cam guide tape head positioner |
CN1363099A (en) * | 1999-07-23 | 2002-08-07 | 西加特技术有限责任公司 | Disturbance rejection of mechanical interaction for dual actuator disc drives using adaptive feed-forward servo |
KR20020013583A (en) * | 1999-10-28 | 2002-02-20 | 추후 | Microactuator-induced reactive forces for fine positioning a sensor |
US6621653B1 (en) * | 2000-06-09 | 2003-09-16 | Hitachi Global Storage Technologies Netherlands B.V. | Secondary actuator system for mode compensation |
US6587303B1 (en) * | 2000-06-09 | 2003-07-01 | International Business Machines Corporation | Servo control of a coarse actuator |
US6519109B1 (en) * | 2000-07-21 | 2003-02-11 | International Business Machines Corporation | Method and apparatus for providing feedforward control of two interacting actuators |
US6580581B1 (en) * | 2000-08-16 | 2003-06-17 | International Business Machines Corporation | Recovery of lateral position of a servo system with respect to longitudinal servo bands of a magnetic tape |
-
2000
- 2000-08-16 US US09/641,135 patent/US6721126B1/en not_active Expired - Fee Related
-
2001
- 2001-07-06 EP EP01947657A patent/EP1309967B1/en not_active Expired - Lifetime
- 2001-07-06 JP JP2002520217A patent/JP4068959B2/en not_active Expired - Fee Related
- 2001-07-06 KR KR10-2003-7001935A patent/KR100523704B1/en not_active IP Right Cessation
- 2001-07-06 AT AT01947657T patent/ATE275752T1/en not_active IP Right Cessation
- 2001-07-06 AU AU2001269303A patent/AU2001269303A1/en not_active Abandoned
- 2001-07-06 WO PCT/GB2001/003063 patent/WO2002015173A1/en active IP Right Grant
- 2001-07-06 CA CA002413132A patent/CA2413132C/en not_active Expired - Lifetime
- 2001-07-06 DE DE60105436T patent/DE60105436T2/en not_active Expired - Lifetime
- 2001-07-06 CN CNB018141749A patent/CN1207701C/en not_active Expired - Fee Related
- 2001-08-09 MY MYPI20013749 patent/MY134153A/en unknown
Also Published As
Publication number | Publication date |
---|---|
CN1447964A (en) | 2003-10-08 |
EP1309967A1 (en) | 2003-05-14 |
EP1309967B1 (en) | 2004-09-08 |
US6721126B1 (en) | 2004-04-13 |
KR100523704B1 (en) | 2005-10-26 |
DE60105436T2 (en) | 2005-10-06 |
ATE275752T1 (en) | 2004-09-15 |
DE60105436D1 (en) | 2004-10-14 |
AU2001269303A1 (en) | 2002-02-25 |
JP4068959B2 (en) | 2008-03-26 |
WO2002015173A1 (en) | 2002-02-21 |
MY134153A (en) | 2007-11-30 |
KR20030024848A (en) | 2003-03-26 |
CN1207701C (en) | 2005-06-22 |
CA2413132C (en) | 2006-09-19 |
JP2004507014A (en) | 2004-03-04 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKEX | Expiry |
Effective date: 20210706 |
|
MKEX | Expiry |
Effective date: 20210706 |