JPS647389A - Magnetic disk - Google Patents
Magnetic diskInfo
- Publication number
- JPS647389A JPS647389A JP16376487A JP16376487A JPS647389A JP S647389 A JPS647389 A JP S647389A JP 16376487 A JP16376487 A JP 16376487A JP 16376487 A JP16376487 A JP 16376487A JP S647389 A JPS647389 A JP S647389A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- servo
- head
- pulse
- motor
- 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
Abstract
PURPOSE:To attain accurate head positioning by moving and positioning a magnetic head in the radial direction of a disk based on servo information recorded on the disk so as to make a difference between a position error signal read from a servo signal and an objective position zero. CONSTITUTION:When a servo region detection circuit 22 detects a signal A representing the head of the servo area, a pulse is outputted to a signal 22a, a position error detection circuit 23 is triggered to output a pulse 23b of a prescribed width from the inside. The pulse 23b rises for a time till servo information 23c is obtained from the head A of the servo region, and after that a timing pulse 23d to apply A/D conversion to a reproducing signal 21b at a prescribed time interval is outputted. The result is fed to a controller 24 in a form of the signal 23a, the difference of the digital values of the signals 34a, 35a is calculated to decide each phase current of a stepping motor 25 thereby driving a motor 25. Thus, servo signals C, D, E, F are sampled synchronously with the signal 23d to decide the drive current of the motor 25 thereby correcting the head 20 at a position 15a.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16376487A JPS647389A (en) | 1987-06-29 | 1987-06-29 | Magnetic disk |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16376487A JPS647389A (en) | 1987-06-29 | 1987-06-29 | Magnetic disk |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS647389A true JPS647389A (en) | 1989-01-11 |
Family
ID=15780264
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16376487A Pending JPS647389A (en) | 1987-06-29 | 1987-06-29 | Magnetic disk |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS647389A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6437774A (en) * | 1987-08-01 | 1989-02-08 | Sony Corp | Discoid magnetic recording medium |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63173280A (en) * | 1987-01-13 | 1988-07-16 | Canon Electronics Inc | Servo-pattern for tracking |
-
1987
- 1987-06-29 JP JP16376487A patent/JPS647389A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63173280A (en) * | 1987-01-13 | 1988-07-16 | Canon Electronics Inc | Servo-pattern for tracking |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6437774A (en) * | 1987-08-01 | 1989-02-08 | Sony Corp | Discoid magnetic recording medium |
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