JPS5480719A - Positioning device for magnetic head - Google Patents
Positioning device for magnetic headInfo
- Publication number
- JPS5480719A JPS5480719A JP14898277A JP14898277A JPS5480719A JP S5480719 A JPS5480719 A JP S5480719A JP 14898277 A JP14898277 A JP 14898277A JP 14898277 A JP14898277 A JP 14898277A JP S5480719 A JPS5480719 A JP S5480719A
- Authority
- JP
- Japan
- Prior art keywords
- track
- signals
- magnetic head
- response
- head
- 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 Head For Track Selection And Changing (AREA)
- Control Of Position Or Direction (AREA)
Abstract
PURPOSE: To measure the number of tracks in response to the signals of servo- track groups to roughly position a magnetic head, when this head is moving at a high speed, and to accomplish the measurement in response to the respective servo- track signals to finely position the magnetic head when this head is moving at a low speed.
CONSTITUTION: The track group position signals VA and the track position signals VB when a magnetic head 40 is moved from track 10 to track 32 are depicted in the drawing. The signals VA are found to have their polarity changed upon each passage of four tracks. The points P20 and P30 detected at detecting levels VA and VA' indicate that the head 40 has passed through the track group, i.e., four servo- tracks. If the measurement of the track number at a high speed is accomplished in response to the signals VA, the accurate position signals VA can be detected. If the track group to which an object track belongs is detected, the track number measurement is accomplished in response to the position signals VB at a low speed, and the fine control is accomplished in the vicinity of the object track so that the magnetic head can be accurately positioned in the object track.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14898277A JPS5480719A (en) | 1977-12-12 | 1977-12-12 | Positioning device for magnetic head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14898277A JPS5480719A (en) | 1977-12-12 | 1977-12-12 | Positioning device for magnetic head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5480719A true JPS5480719A (en) | 1979-06-27 |
Family
ID=15465037
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14898277A Pending JPS5480719A (en) | 1977-12-12 | 1977-12-12 | Positioning device for magnetic head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5480719A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56153562A (en) * | 1980-04-26 | 1981-11-27 | Matsushita Electric Ind Co Ltd | Recorder and reproducer |
| JPS58100284A (en) * | 1981-12-10 | 1983-06-14 | Toshiba Anpetsukusu Kk | Recording system for information edited for unifying cm |
| JPS61216183A (en) * | 1985-03-22 | 1986-09-25 | Hitachi Ltd | Information retrieving device |
| JPH01143085A (en) * | 1987-11-30 | 1989-06-05 | Teac Corp | Magnetic disk device |
-
1977
- 1977-12-12 JP JP14898277A patent/JPS5480719A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56153562A (en) * | 1980-04-26 | 1981-11-27 | Matsushita Electric Ind Co Ltd | Recorder and reproducer |
| JPH0230110B2 (en) * | 1980-04-26 | 1990-07-04 | Matsushita Electric Ind Co Ltd | |
| JPS58100284A (en) * | 1981-12-10 | 1983-06-14 | Toshiba Anpetsukusu Kk | Recording system for information edited for unifying cm |
| JPS61216183A (en) * | 1985-03-22 | 1986-09-25 | Hitachi Ltd | Information retrieving device |
| JPH01143085A (en) * | 1987-11-30 | 1989-06-05 | Teac Corp | Magnetic disk device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0094828A3 (en) | Apparatus for indicating the position of a member | |
| JPS5564662A (en) | Self-compensator for magnetic disk memory unit | |
| DK0506605T3 (en) | Apparatus for tracking magnetizable materials in buildings | |
| JPS5480719A (en) | Positioning device for magnetic head | |
| JPS5729035A (en) | Stop control method for camera | |
| JPS5216932A (en) | Indication method for cash register | |
| JPS5359455A (en) | Radiation measuring apparatus | |
| JPS5693147A (en) | Head position control signal system | |
| JPS5220854A (en) | Coordinate position measurement of three dimension measuring instrumen t of number control | |
| JPS5434214A (en) | Location controlling system of servo head in magnetic disc recorder | |
| JPS57122308A (en) | Measuring method for linearity of herical scan track | |
| JPS5366257A (en) | Measuring instrument for fluid | |
| JPS55123806A (en) | Endless belt for controlling transfer | |
| JPS56137557A (en) | Detecting method of reference track position for magnetic disc device | |
| JPS53110502A (en) | Record player | |
| JPS51143358A (en) | Optical instrument for measuring displacement of a rail | |
| JPS543507A (en) | Magnetic recorder and magnetic reproducer | |
| JPS5683834A (en) | Position measuring method of magnetic head and standard magnetic tape using in this method | |
| JPS5687817A (en) | Detecting method of movement | |
| JPS5327459A (en) | Measuring system for change-over time of trolley line | |
| JPS5728204A (en) | Measuring method for object moving continuously | |
| SU591957A1 (en) | Cylindrical magnetic domains readout device | |
| JPS5679963A (en) | Waveform measuring method and its device | |
| JPS5342632A (en) | Stability continous test method of bubble information | |
| JPS5612506A (en) | Method and apparatus for gauging long line object |