JPS5570972A - Magnetic disc unit - Google Patents
Magnetic disc unitInfo
- Publication number
- JPS5570972A JPS5570972A JP14302178A JP14302178A JPS5570972A JP S5570972 A JPS5570972 A JP S5570972A JP 14302178 A JP14302178 A JP 14302178A JP 14302178 A JP14302178 A JP 14302178A JP S5570972 A JPS5570972 A JP S5570972A
- Authority
- JP
- Japan
- Prior art keywords
- positioning
- voice coil
- signal
- detector
- circuit
- 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
- 239000011888 foil Substances 0.000 abstract 2
- 230000017525 heat dissipation Effects 0.000 abstract 1
Landscapes
- Moving Of Head For Track Selection And Changing (AREA)
Abstract
PURPOSE: To restrict the heat dissipation of voice coil and to shorten the average positioning time, by changing the positioning speed according to the temperature of voice coil.
CONSTITUTION: The foil type temperature detector 20 is given to the voice coil 16 of the linear motor consisting of the yoke 17 mounted at one side of the stand wheel 14 of the positioning set 5 having position detector 18. Thus, with the positioning information 6 from the positioning logic circuit 1, the positioning speed signal is produced through the reference speed generation circuit 2 and the addition circuit 3, the drive circuit 4 flows drive current to the voice coil 16 based on this, the positioning set 5 is driven and the position signal 12 from the position detector 18 is changed, and the positioning is finished when the positioning information 6 is reduced into zero. In this case, the speed signal from the speed detector 19 is fed back to the addition circuit 3 so that the deviation with the reference speed signal 7 can be zeroed. On the other hand, when the number of times of positioning operations are more, in the unit time, the voice coil 16 rises in temperature, and the temperature signal 11 from the foil type temperature detector 20 is fed back to the addition circuit 3 to reduce the addition signal 8.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14302178A JPS5570972A (en) | 1978-11-20 | 1978-11-20 | Magnetic disc unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14302178A JPS5570972A (en) | 1978-11-20 | 1978-11-20 | Magnetic disc unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5570972A true JPS5570972A (en) | 1980-05-28 |
Family
ID=15329070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14302178A Pending JPS5570972A (en) | 1978-11-20 | 1978-11-20 | Magnetic disc unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5570972A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0237580A (en) * | 1988-07-26 | 1990-02-07 | Oki Electric Ind Co Ltd | Optical recording and reproducing device |
| JPH02297782A (en) * | 1989-04-26 | 1990-12-10 | Internatl Business Mach Corp <Ibm> | Data memory |
| US6369972B1 (en) * | 1999-05-14 | 2002-04-09 | Western Digital Technologies, Inc. | Temperature monitoring method of a disk drive voice coil motor from a traveled distance |
| EP1619669A1 (en) * | 1993-12-15 | 2006-01-25 | Seagate Removable Storage Solutions LLC | Voice coil driven positioner for coarse and fine positioning of magnetic head in multi-track type drive |
-
1978
- 1978-11-20 JP JP14302178A patent/JPS5570972A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0237580A (en) * | 1988-07-26 | 1990-02-07 | Oki Electric Ind Co Ltd | Optical recording and reproducing device |
| JPH02297782A (en) * | 1989-04-26 | 1990-12-10 | Internatl Business Mach Corp <Ibm> | Data memory |
| EP1619669A1 (en) * | 1993-12-15 | 2006-01-25 | Seagate Removable Storage Solutions LLC | Voice coil driven positioner for coarse and fine positioning of magnetic head in multi-track type drive |
| US6369972B1 (en) * | 1999-05-14 | 2002-04-09 | Western Digital Technologies, Inc. | Temperature monitoring method of a disk drive voice coil motor from a traveled distance |
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