JPS5611663A - Magnetic disc unit - Google Patents
Magnetic disc unitInfo
- Publication number
- JPS5611663A JPS5611663A JP8365679A JP8365679A JPS5611663A JP S5611663 A JPS5611663 A JP S5611663A JP 8365679 A JP8365679 A JP 8365679A JP 8365679 A JP8365679 A JP 8365679A JP S5611663 A JPS5611663 A JP S5611663A
- Authority
- JP
- Japan
- Prior art keywords
- head
- linear expansion
- temperature difference
- head arm
- thermal
- 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 Heads (AREA)
Abstract
PURPOSE: To avoid thermal off-track due to temperature difference between write-in and readout, by satisfying the specific relation between the coefficient of linear expansion of the data head arm and that of the servo head arm.
CONSTITUTION: If there is temperature difference of ΔT°C between the temperature in the head disc assembly 3 when information is written in the data disc 14 and that in the said assembly 3 when the information is read out, the thermal off-track amount d due to this is expressed by equation (1). The head arms 16, 17 are formed with the combination of materials so that the linear expansion coefficient α4 of the servo head arm 17 is expressed by equation (2) to the linear expansion coefficient α1 of the data head arm 16. Thus, the thermal off-track amount d is always zero regardless of the temperature difference between write-in and readout in the head disc assembly 3.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8365679A JPS5611663A (en) | 1979-07-02 | 1979-07-02 | Magnetic disc unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8365679A JPS5611663A (en) | 1979-07-02 | 1979-07-02 | Magnetic disc unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5611663A true JPS5611663A (en) | 1981-02-05 |
Family
ID=13808489
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8365679A Pending JPS5611663A (en) | 1979-07-02 | 1979-07-02 | Magnetic disc unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5611663A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0055568A1 (en) * | 1980-12-23 | 1982-07-07 | Rodime PLC | Read-write head thermal compensation system |
JPS63311674A (en) * | 1987-06-12 | 1988-12-20 | Fujitsu Ltd | Magnetic head positioner |
JPH0393076A (en) * | 1989-09-05 | 1991-04-18 | Hitachi Ltd | Magnetic disk device |
-
1979
- 1979-07-02 JP JP8365679A patent/JPS5611663A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0055568A1 (en) * | 1980-12-23 | 1982-07-07 | Rodime PLC | Read-write head thermal compensation system |
JPS63311674A (en) * | 1987-06-12 | 1988-12-20 | Fujitsu Ltd | Magnetic head positioner |
JPH0393076A (en) * | 1989-09-05 | 1991-04-18 | Hitachi Ltd | Magnetic disk device |
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