JPS6453383A - Disk device - Google Patents
Disk deviceInfo
- Publication number
- JPS6453383A JPS6453383A JP21064787A JP21064787A JPS6453383A JP S6453383 A JPS6453383 A JP S6453383A JP 21064787 A JP21064787 A JP 21064787A JP 21064787 A JP21064787 A JP 21064787A JP S6453383 A JPS6453383 A JP S6453383A
- Authority
- JP
- Japan
- Prior art keywords
- spindle motor
- spindle
- light
- reflection
- reference value
- 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 exactly perform the rotational control of a spindle motor, by using an optical means by providing a grid stripe at the rotor part of a spindle motor. CONSTITUTION:A beam of light from a LED2 mounted adjacently to the grid stripes 4 of reflection and non-reflection attached at, for example, the outer peripheral part of the rotor part 1 of the spindle motor is projected, and a photodiode 3 in a photodetecting part transmits output to an arranging part 5 corresponding to the above beam of light. The arranging part 5 converts the output to a pulse signal, and a pulse interval counting part 6 calculates a pulse interval by a reference clock, and a comparison part 7 compares the count value with a reference value from a reference value table 8 indicated by spindle speed 9. And a spindle motor control part 10 sends a signal to a spindle motor driver 11 corresponding to a difference from the comparison part 7, and controls the rotating speed of the spindle motor. In such a way, it is possible to perform the rotational control of the spindle motor accurately.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21064787A JPS6453383A (en) | 1987-08-25 | 1987-08-25 | Disk device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21064787A JPS6453383A (en) | 1987-08-25 | 1987-08-25 | Disk device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6453383A true JPS6453383A (en) | 1989-03-01 |
Family
ID=16592772
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP21064787A Pending JPS6453383A (en) | 1987-08-25 | 1987-08-25 | Disk device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6453383A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5290377A (en) * | 1990-07-17 | 1994-03-01 | Nippon Petrochemicals Company, Ltd. | Method for producing reticular nonwoven fabric |
JPH06158509A (en) * | 1992-11-13 | 1994-06-07 | Japan Steel Works Ltd:The | Production of netlike nonwoven fabric and its apparatus |
-
1987
- 1987-08-25 JP JP21064787A patent/JPS6453383A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5290377A (en) * | 1990-07-17 | 1994-03-01 | Nippon Petrochemicals Company, Ltd. | Method for producing reticular nonwoven fabric |
JPH06158509A (en) * | 1992-11-13 | 1994-06-07 | Japan Steel Works Ltd:The | Production of netlike nonwoven fabric and its apparatus |
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