JPS5640912A - Position control unit - Google Patents
Position control unitInfo
- Publication number
- JPS5640912A JPS5640912A JP11640479A JP11640479A JPS5640912A JP S5640912 A JPS5640912 A JP S5640912A JP 11640479 A JP11640479 A JP 11640479A JP 11640479 A JP11640479 A JP 11640479A JP S5640912 A JPS5640912 A JP S5640912A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- linear motor
- scale
- circuit
- led
- 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.)
- Granted
Links
Landscapes
- Moving Of Head For Track Selection And Changing (AREA)
- Control Of Position Or Direction (AREA)
- Control Of Linear Motors (AREA)
Abstract
PURPOSE: To ensure a smooth retrieving by detecting the record track position of the document information by the scale signal generator provided to the linear motor which drives the linear actuator.
CONSTITUTION: The scale signal generator 45 incorporating the linear motor 30 generates the scale signals A and B in accordance with the shift of the motor 30. The signals A and B are led to the signal converter 49 and then switched with every 90°-phase to be delivered in the form of the saw-tooth type reference signal C. The signal C is led to one input of the differential amplifier 51 via the buffer amplifier 50 as well as to the sample holding circuit 52. The circuit 52 gives an access to the desired track by the track detector 53 for detection and thus holds the signal C. Then the feedback circuit is provided to give a servo control to the working position of the linear motor based on the differential between the sample holding value and the signal C.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54116404A JPS586165B2 (en) | 1979-09-11 | 1979-09-11 | position control device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54116404A JPS586165B2 (en) | 1979-09-11 | 1979-09-11 | position control device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5640912A true JPS5640912A (en) | 1981-04-17 |
JPS586165B2 JPS586165B2 (en) | 1983-02-03 |
Family
ID=14686202
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP54116404A Expired JPS586165B2 (en) | 1979-09-11 | 1979-09-11 | position control device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS586165B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59193553A (en) * | 1983-04-19 | 1984-11-02 | Nec Corp | Track accessing device of optical disk system |
-
1979
- 1979-09-11 JP JP54116404A patent/JPS586165B2/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59193553A (en) * | 1983-04-19 | 1984-11-02 | Nec Corp | Track accessing device of optical disk system |
JPH0150973B2 (en) * | 1983-04-19 | 1989-11-01 | Nippon Electric Co |
Also Published As
Publication number | Publication date |
---|---|
JPS586165B2 (en) | 1983-02-03 |
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