JPS5693118A - Head device - Google Patents

Head device

Info

Publication number
JPS5693118A
JPS5693118A JP16974379A JP16974379A JPS5693118A JP S5693118 A JPS5693118 A JP S5693118A JP 16974379 A JP16974379 A JP 16974379A JP 16974379 A JP16974379 A JP 16974379A JP S5693118 A JPS5693118 A JP S5693118A
Authority
JP
Japan
Prior art keywords
head
track
rotating angle
hole
signal
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
JP16974379A
Other languages
Japanese (ja)
Inventor
Masakazu Yokoyama
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP16974379A priority Critical patent/JPS5693118A/en
Publication of JPS5693118A publication Critical patent/JPS5693118A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To secure a highly accurate setting for the head reference position even in case when the track pitch is reduced especially, by securing a simple constitution in that the reference position is detected based on the detection gear controlled at the specific rotating angle position of a driving step motor.
CONSTITUTION: The detection gear 30 is set so that it turns in a range less than a turn when the step motor 27 turns in an extent which is required to shift the head 21 from the head track position on the tape 11 to the final track position. At the same time, the through-hole 31 is provided to the detection gear 30 along with the through-hole detector 32 consisting of the light emitting element 32a and the photodetector 32b. Then the detection signal of the rotating angle position of the gear 30 is obtained when the hole 31 coincides with the detector 32. In the mode under which this signal is obtained, the head 21 is set to coincide with the head track of the tape 11 and then the detection signal of the rotating angle position is used for the head position reference signal.
COPYRIGHT: (C)1981,JPO&Japio
JP16974379A 1979-12-26 1979-12-26 Head device Pending JPS5693118A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16974379A JPS5693118A (en) 1979-12-26 1979-12-26 Head device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16974379A JPS5693118A (en) 1979-12-26 1979-12-26 Head device

Publications (1)

Publication Number Publication Date
JPS5693118A true JPS5693118A (en) 1981-07-28

Family

ID=15892017

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16974379A Pending JPS5693118A (en) 1979-12-26 1979-12-26 Head device

Country Status (1)

Country Link
JP (1) JPS5693118A (en)

Similar Documents

Publication Publication Date Title
JPS5671855A (en) Playback device of disc
JPS56165974A (en) Discontinuous point detector for time code address
JPS5693118A (en) Head device
JPS52110599A (en) Vehicle position detection device
JPS53114462A (en) Position locating system
JPS5442612A (en) Electronic rotor
JPS5226880A (en) Vehicle speed and position detecting device
JPS5755565A (en) Controller of pickup
JPS5746352A (en) Disk device
JPS5455904A (en) Automatic control system for stopping train at predetermined position
JPS5755564A (en) Controller of pickup
JPS5455317A (en) Control system for quantity of light of pickup unit
JPS52110030A (en) Detector for distinctness of object image
JPS5344081A (en) Analyzer using magnetic optical effect
JPS52142501A (en) Focal point detection for video disc apparatus
JPS53118012A (en) Automatic tracking device
JPS55138738A (en) Light quantity control system in image input device
JPS5538583A (en) Exposure control mechanism in cine camera
JPS5766569A (en) Disk reproducing device
JPS5274305A (en) Optical tracking controller
JPS57103163A (en) Rotation control system of magnetic disk device
JPS5394959A (en) Maximum value measuring apparatus
JPS5395607A (en) Automatic head locator of tape recorder or the like
JPS5377989A (en) Rotation controller
JPS52129544A (en) Detection and control device for rotational position