JPS54158207A - Head offset controller of movable head type - Google Patents
Head offset controller of movable head typeInfo
- Publication number
- JPS54158207A JPS54158207A JP6664278A JP6664278A JPS54158207A JP S54158207 A JPS54158207 A JP S54158207A JP 6664278 A JP6664278 A JP 6664278A JP 6664278 A JP6664278 A JP 6664278A JP S54158207 A JPS54158207 A JP S54158207A
- Authority
- JP
- Japan
- Prior art keywords
- head
- servo
- track
- offset
- read out
- 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.)
- Pending
Links
Landscapes
- Moving Of The Head To Find And Align With The Track (AREA)
Abstract
PURPOSE: To automatically control the offset of a head during the recording and reproducing operations by storing the offset of the head in a register through a head positioning servo-track which is formed outside of the recording and reproducing regions of a disk.
CONSTITUTION: A head calibrating servo-track 9, which is recorded with head position calibrating position signals, is formed outside of the data recording and reproducing region including the O track of the initial positions of the respective disks 2 constituting a disk pack. The information in the track 9 is read out with the head peculiar to the disks 2 and is compared with the servo-information, which is read out by a servo-head, so that the offset of the head resulting from the addition and subtraction in accordance with the difference is stored in a register in case there is a higher difference than an allowable value. The stored content is read out upon the addressing operation of the corresponding head so that the head is automatically offset by the calibration of the servo-control of the head cylinder thereby to effect the accurate tracking operation.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6664278A JPS54158207A (en) | 1978-06-05 | 1978-06-05 | Head offset controller of movable head type |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6664278A JPS54158207A (en) | 1978-06-05 | 1978-06-05 | Head offset controller of movable head type |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54158207A true JPS54158207A (en) | 1979-12-13 |
Family
ID=13321745
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6664278A Pending JPS54158207A (en) | 1978-06-05 | 1978-06-05 | Head offset controller of movable head type |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54158207A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5629872A (en) * | 1979-08-21 | 1981-03-25 | Fujitsu Ltd | Disc device having tracking correction circuit |
EP0042931A2 (en) * | 1980-06-30 | 1982-01-06 | International Business Machines Corporation | Magnetic disk initialization method |
EP0082337A2 (en) * | 1981-12-23 | 1983-06-29 | International Business Machines Corporation | Assembly including a flexible disk and a diskdrive therefor |
JPS5958672A (en) * | 1982-09-28 | 1984-04-04 | Fujitsu Ltd | Offset seek control system |
JPH04222973A (en) * | 1990-12-26 | 1992-08-12 | Nec Eng Ltd | Magnetic disk device |
US5555139A (en) * | 1986-11-10 | 1996-09-10 | Seagate Technology, Inc. | Dual track servo system with position interpolation |
US10826352B2 (en) | 2015-09-30 | 2020-11-03 | Siemens Aktiengesellschaft | Electric machine with variable cooling system |
-
1978
- 1978-06-05 JP JP6664278A patent/JPS54158207A/en active Pending
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5629872A (en) * | 1979-08-21 | 1981-03-25 | Fujitsu Ltd | Disc device having tracking correction circuit |
EP0042931A2 (en) * | 1980-06-30 | 1982-01-06 | International Business Machines Corporation | Magnetic disk initialization method |
EP0042931A3 (en) * | 1980-06-30 | 1982-05-12 | International Business Machines Corporation | Magnetic disk initialization method |
EP0082337A2 (en) * | 1981-12-23 | 1983-06-29 | International Business Machines Corporation | Assembly including a flexible disk and a diskdrive therefor |
JPS5958672A (en) * | 1982-09-28 | 1984-04-04 | Fujitsu Ltd | Offset seek control system |
JPH0142072B2 (en) * | 1982-09-28 | 1989-09-08 | Fujitsu Ltd | |
US5555139A (en) * | 1986-11-10 | 1996-09-10 | Seagate Technology, Inc. | Dual track servo system with position interpolation |
JPH04222973A (en) * | 1990-12-26 | 1992-08-12 | Nec Eng Ltd | Magnetic disk device |
US10826352B2 (en) | 2015-09-30 | 2020-11-03 | Siemens Aktiengesellschaft | Electric machine with variable cooling system |
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