JPS6473576A - Recording and reproducing device - Google Patents

Recording and reproducing device

Info

Publication number
JPS6473576A
JPS6473576A JP62230123A JP23012387A JPS6473576A JP S6473576 A JPS6473576 A JP S6473576A JP 62230123 A JP62230123 A JP 62230123A JP 23012387 A JP23012387 A JP 23012387A JP S6473576 A JPS6473576 A JP S6473576A
Authority
JP
Japan
Prior art keywords
state
reading position
positioning means
objective
track
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
Application number
JP62230123A
Other languages
Japanese (ja)
Other versions
JP2615662B2 (en
Inventor
Ryosuke Shimizu
Shinichi Tanaka
Takeshi Shimamoto
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP62230123A priority Critical patent/JP2615662B2/en
Publication of JPS6473576A publication Critical patent/JPS6473576A/en
Application granted granted Critical
Publication of JP2615662B2 publication Critical patent/JP2615662B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
  • Moving Of Head For Track Selection And Changing (AREA)

Abstract

PURPOSE:To enable a reading position to be reached at an objective track in a short time by providing a control means driving a minute positioning means and a rough positioning means to position or to follow-up the reading position on the objective information track or near it. CONSTITUTION:When the reading position is made access toward the objective track, a first state mainly using the rough positioning means 5 and a second state executing parallel driving by using the both of the minute positioning mean 2 and the rough positioning means 5 are made. Then, when acceleration rapidly changes, a section where the displacement of the minute positioning mean 2 is provided at the objective track or near it. Besides, a parallel driving control command means 33 which commands that a speed control system uses the first state or the second state and a variable gain means 34 which can restrict the amplitude of a signal added to the minute positioning means 2 to make the first state and the second state are provided. Thus the access which the reading position can be approached to a magnetic disk device in a shorter time than usual is realized.
JP62230123A 1987-09-14 1987-09-14 Recording and playback device Expired - Fee Related JP2615662B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62230123A JP2615662B2 (en) 1987-09-14 1987-09-14 Recording and playback device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62230123A JP2615662B2 (en) 1987-09-14 1987-09-14 Recording and playback device

Publications (2)

Publication Number Publication Date
JPS6473576A true JPS6473576A (en) 1989-03-17
JP2615662B2 JP2615662B2 (en) 1997-06-04

Family

ID=16902927

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62230123A Expired - Fee Related JP2615662B2 (en) 1987-09-14 1987-09-14 Recording and playback device

Country Status (1)

Country Link
JP (1) JP2615662B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01290176A (en) * 1988-05-18 1989-11-22 Sony Corp High speed seek device for optical disk

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61276132A (en) * 1985-05-31 1986-12-06 Hitachi Ltd High-speed seeking system for optical disk

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61276132A (en) * 1985-05-31 1986-12-06 Hitachi Ltd High-speed seeking system for optical disk

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01290176A (en) * 1988-05-18 1989-11-22 Sony Corp High speed seek device for optical disk

Also Published As

Publication number Publication date
JP2615662B2 (en) 1997-06-04

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees