JPS5644160A - Detector for position of pickup arm - Google Patents
Detector for position of pickup armInfo
- Publication number
- JPS5644160A JPS5644160A JP11966879A JP11966879A JPS5644160A JP S5644160 A JPS5644160 A JP S5644160A JP 11966879 A JP11966879 A JP 11966879A JP 11966879 A JP11966879 A JP 11966879A JP S5644160 A JPS5644160 A JP S5644160A
- Authority
- JP
- Japan
- Prior art keywords
- feed screw
- pulse
- parallel
- arm body
- arm
- 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
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B3/00—Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor
- G11B3/02—Arrangements of heads
- G11B3/08—Raising, lowering, traversing otherwise than for transducing, arresting, or holding-up heads against record carriers
- G11B3/085—Raising, lowering, traversing otherwise than for transducing, arresting, or holding-up heads against record carriers using automatic means
- G11B3/08503—Control of drive of the head
- G11B3/08519—Control of drive of the head for pick-up arms moving parallel to itself
- G11B3/08525—Control of drive of the head for pick-up arms moving parallel to itself using optical detecting means
Landscapes
- Moving Of Head For Track Selection And Changing (AREA)
Abstract
PURPOSE:To perform high-precision position detection by a small number of sensors by using a pulse signal of a frequency proportional to a moving speed for control over the operation of a pickup moved by a motor. CONSTITUTION:Arm body 2 rotatably coupled with trestle 4 moves in parallel on rail 5 as feed screw 6 turns. Direct-current motor 9 as the power source of feed screw 6 is so controlled by the offset angle detection servo that arm body 2 will be in parallel to the tangent to the record modulated groove. The pulse generator consisting of pulse disk 10 provided around feed screw 6, light source 11 and photosensor 12 outputs pulses of a frequency in proportion to the feed speed. The pulse signal from the pulse generator is inputted to the up-down counter, whose count value is compared to a preset value to detect the position of the arm.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11966879A JPS5644160A (en) | 1979-09-17 | 1979-09-17 | Detector for position of pickup arm |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11966879A JPS5644160A (en) | 1979-09-17 | 1979-09-17 | Detector for position of pickup arm |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5644160A true JPS5644160A (en) | 1981-04-23 |
Family
ID=14767096
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11966879A Pending JPS5644160A (en) | 1979-09-17 | 1979-09-17 | Detector for position of pickup arm |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5644160A (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS51132811A (en) * | 1975-01-20 | 1976-11-18 | Matsushita Electric Ind Co Ltd | Automatic record player |
JPS52119904A (en) * | 1976-04-01 | 1977-10-07 | Nippon Gakki Seizo Kk | Arm control device |
-
1979
- 1979-09-17 JP JP11966879A patent/JPS5644160A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS51132811A (en) * | 1975-01-20 | 1976-11-18 | Matsushita Electric Ind Co Ltd | Automatic record player |
JPS52119904A (en) * | 1976-04-01 | 1977-10-07 | Nippon Gakki Seizo Kk | Arm control device |
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