JPS57200972A - Arm servo-device - Google Patents

Arm servo-device

Info

Publication number
JPS57200972A
JPS57200972A JP8435481A JP8435481A JPS57200972A JP S57200972 A JPS57200972 A JP S57200972A JP 8435481 A JP8435481 A JP 8435481A JP 8435481 A JP8435481 A JP 8435481A JP S57200972 A JPS57200972 A JP S57200972A
Authority
JP
Japan
Prior art keywords
stylus
signal
absolute value
pulse width
deviation
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
Application number
JP8435481A
Other languages
Japanese (ja)
Inventor
Tokinari Furuichi
Keizo Shimizu
Junichi Ikoma
Masao Oguri
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP8435481A priority Critical patent/JPS57200972A/en
Publication of JPS57200972A publication Critical patent/JPS57200972A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B21/00—Head arrangements not specific to the method of recording or reproducing
    • G11B21/02—Driving or moving of heads
    • G11B21/04—Automatic feed mechanism producing a progressive transducing traverse of the head in a direction which cuts across the direction of travel of the recording medium, e.g. helical scan, e.g. by lead-screw

Landscapes

  • Control Of Position Or Direction (AREA)

Abstract

PURPOSE:To exactly control an arm at a low cost, by modulating pulse width of a signal which has detected relative deviation between a picture signal fetching part and a pickup arm, comparing it with the reference potential, and driving a DC motor by a deviation pulse. CONSTITUTION:A detecting signal derived from a stylus deviation detector 1 is amplified by an amplifier 2. By an absolute value circuit 9, the detecting signal derived from the amplifier 2, and a polarity signal derived from a polarity circuit 11 are led in, and detecting voltage in the reference position of a stylus against a pickup arm is set as reference voltage, by which an absolute value signal related to a relative position of the stylus is obtained. This absolute value signal is applied to a pulse width modulating circuit 10, by which it is possible to obtain a driving pulse of the motor having pulse width which is varied by the relative position of the stylus against the pickup arm.
JP8435481A 1981-06-03 1981-06-03 Arm servo-device Pending JPS57200972A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8435481A JPS57200972A (en) 1981-06-03 1981-06-03 Arm servo-device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8435481A JPS57200972A (en) 1981-06-03 1981-06-03 Arm servo-device

Publications (1)

Publication Number Publication Date
JPS57200972A true JPS57200972A (en) 1982-12-09

Family

ID=13828173

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8435481A Pending JPS57200972A (en) 1981-06-03 1981-06-03 Arm servo-device

Country Status (1)

Country Link
JP (1) JPS57200972A (en)

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