JPS56145062A - Tape roll diameter detecting method - Google Patents

Tape roll diameter detecting method

Info

Publication number
JPS56145062A
JPS56145062A JP4664680A JP4664680A JPS56145062A JP S56145062 A JPS56145062 A JP S56145062A JP 4664680 A JP4664680 A JP 4664680A JP 4664680 A JP4664680 A JP 4664680A JP S56145062 A JPS56145062 A JP S56145062A
Authority
JP
Japan
Prior art keywords
tape
pressure
roll diameter
tape roll
detecting method
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
JP4664680A
Other languages
Japanese (ja)
Inventor
Takeyoshi Koi
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP4664680A priority Critical patent/JPS56145062A/en
Publication of JPS56145062A publication Critical patent/JPS56145062A/en
Pending legal-status Critical Current

Links

Landscapes

  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)

Abstract

PURPOSE: To detect the roll diameter of a tape and moment of inertia by detecting the internal pressure of a tape roll core on the reel of a magnetic tape apparatus etc. by means of a pressure semiconductor or the like.
CONSTITUTION: The pressure P per unit area which acts on each part of a tape 2 in the radial direction of the reel 1 is measured with a pressure semiconductor 3, and the radius (r) is calculated according to the calculation formula shown in the figure with the measured pressure P, tension force T of the tape, and tape width (w). Thus, the rolling diameter of the tape and the moment of inertia can be detected.
COPYRIGHT: (C)1981,JPO&Japio
JP4664680A 1980-04-09 1980-04-09 Tape roll diameter detecting method Pending JPS56145062A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4664680A JPS56145062A (en) 1980-04-09 1980-04-09 Tape roll diameter detecting method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4664680A JPS56145062A (en) 1980-04-09 1980-04-09 Tape roll diameter detecting method

Publications (1)

Publication Number Publication Date
JPS56145062A true JPS56145062A (en) 1981-11-11

Family

ID=12753070

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4664680A Pending JPS56145062A (en) 1980-04-09 1980-04-09 Tape roll diameter detecting method

Country Status (1)

Country Link
JP (1) JPS56145062A (en)

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