JPH04321940A - Method and device for controlling speed of optical head - Google Patents

Method and device for controlling speed of optical head

Info

Publication number
JPH04321940A
JPH04321940A JP41198890A JP41198890A JPH04321940A JP H04321940 A JPH04321940 A JP H04321940A JP 41198890 A JP41198890 A JP 41198890A JP 41198890 A JP41198890 A JP 41198890A JP H04321940 A JPH04321940 A JP H04321940A
Authority
JP
Japan
Prior art keywords
case
speed
signal
switched
executed
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
JP41198890A
Other languages
Japanese (ja)
Inventor
Daisuke Iguchi
Kaoru Yasukawa
Original Assignee
Fuji Xerox 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 Fuji Xerox Co Ltd filed Critical Fuji Xerox Co Ltd
Priority to JP41198890A priority Critical patent/JPH04321940A/en
Publication of JPH04321940A publication Critical patent/JPH04321940A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To execute the deceleration at a high speed equal acceleration, and to surely move head to a target track by executing tracking servo, in the case of passing through the center of the target track or in the case the number of remaining tracks becomes zero.
CONSTITUTION: By feeding back a difference signal 55 of a reference speed signal 55 of a reference speed signal 30 and a speed detecting signal 39, speed control of a seek operation of an optical head 20 is executed. In that case, in the case the number of remaining tracks becomes a prescribed value, that is ≤'1', a first timing signal 47 is outputted generating circuit 44, and a first switching circuit 31 is switched to a ground level. Also, in the case the speed detecting signal 39 becomes a prescribed value or below, a switching circuit 34 is switched to a ground level by a second timing signal 52. Moreover, in the case of passing through the center of a target track, a switching circuit 41 is switched to a tracking servo 40 side by a third timing signal 52, therefore, deceleration is executed at a high speed by equal acceleration, and tracking servo can be executed surely.
COPYRIGHT: (C)1992,JPO&Japio
JP41198890A 1990-12-20 1990-12-20 Method and device for controlling speed of optical head Pending JPH04321940A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP41198890A JPH04321940A (en) 1990-12-20 1990-12-20 Method and device for controlling speed of optical head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP41198890A JPH04321940A (en) 1990-12-20 1990-12-20 Method and device for controlling speed of optical head

Publications (1)

Publication Number Publication Date
JPH04321940A true JPH04321940A (en) 1992-11-11

Family

ID=18520888

Family Applications (1)

Application Number Title Priority Date Filing Date
JP41198890A Pending JPH04321940A (en) 1990-12-20 1990-12-20 Method and device for controlling speed of optical head

Country Status (1)

Country Link
JP (1) JPH04321940A (en)

Similar Documents

Publication Publication Date Title
JPH0368004A (en) Positioning device
JPS63269324A (en) Optical disk driving device
JPS61194645A (en) Track leading-in method for optical disk device
JPH01271921A (en) Disk device
JPH0279224A (en) Tracking servo device
JPH02103734A (en) Tracking controller
JPH01124170A (en) Head positioning control system
JPS60143442A (en) Tracking system
JPH04321940A (en) Method and device for controlling speed of optical head
JPS61177641A (en) Track access device in optical disk
JPS6254835A (en) Method for controlling track jump
JPS62128025A (en) Track jump controller for optical reproducing device
JPH01134768A (en) System for track access in optical disk device
JPS62125543A (en) Track jump controller for optical reproducer
JPH02185720A (en) Track jump controller for optical recording and reproducing device
JPH03276214A (en) Positioning controller and information recording/ reproducing device using the same
JPH02149930A (en) Method for controlling track access of optical disk device
JPH0341668A (en) Index signal control circuit of magnetic disk device
JPS6257129A (en) Track jump control method
JPH03254424A (en) Control method for optical disk device
JPS63257969A (en) Magnetic disk device
JPS63127437A (en) Track jump system for optical disk device
JPH01290176A (en) High speed seek device for optical disk
JPH0411330A (en) Track jump controller for optical disk device
JPH0210571A (en) Disk player