JPH0266048A - Tracking control device - Google Patents

Tracking control device

Info

Publication number
JPH0266048A
JPH0266048A JP21885788A JP21885788A JPH0266048A JP H0266048 A JPH0266048 A JP H0266048A JP 21885788 A JP21885788 A JP 21885788A JP 21885788 A JP21885788 A JP 21885788A JP H0266048 A JPH0266048 A JP H0266048A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
point
distance
sheet material
tracking
reaches
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
JP21885788A
Inventor
Hideaki Hishiyama
Original Assignee
Toshiba Corp
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

Links

Abstract

PURPOSE: To perform a high accurate tracking control by detecting the timing, in which a tracking point of a sheet material fed in a condition applying tension reaches an arbitrary measuring point, with an influence removed due to the elongation generated in the sheet material.
CONSTITUTION: A tracking point 1a in a sheet material 1 passes through a reference point A thereafter moves by a distance, and it is calculated as a distance l being based on a feed speed of the first roll 4. For a value of this distance l, in order to remove an influence by elongation generated in the sheet material 1, elongation Δl, generated between the first roll 4 and a passing point, is calculated, when a value of l-Δl reaches a distance l1 from the reference point A to a measuring point C, a signal SG1 is output. In this way, the timing, in which the tracking point 1a reaches the tracking point measuring point C, can be accurately known.
COPYRIGHT: (C)1990,JPO&Japio
JP21885788A 1988-09-01 1988-09-01 Tracking control device Pending JPH0266048A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21885788A JPH0266048A (en) 1988-09-01 1988-09-01 Tracking control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21885788A JPH0266048A (en) 1988-09-01 1988-09-01 Tracking control device

Publications (1)

Publication Number Publication Date
JPH0266048A true true JPH0266048A (en) 1990-03-06

Family

ID=16726410

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21885788A Pending JPH0266048A (en) 1988-09-01 1988-09-01 Tracking control device

Country Status (1)

Country Link
JP (1) JPH0266048A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6704508B1 (en) 1999-06-16 2004-03-09 Nec Corporation Optical crossconnect, optical network device, and connection status supervisory method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6704508B1 (en) 1999-06-16 2004-03-09 Nec Corporation Optical crossconnect, optical network device, and connection status supervisory method

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