JPS6425331A - Reel radius detecting circuit for magnetic tape device - Google Patents
Reel radius detecting circuit for magnetic tape deviceInfo
- Publication number
- JPS6425331A JPS6425331A JP62179973A JP17997387A JPS6425331A JP S6425331 A JPS6425331 A JP S6425331A JP 62179973 A JP62179973 A JP 62179973A JP 17997387 A JP17997387 A JP 17997387A JP S6425331 A JPS6425331 A JP S6425331A
- Authority
- JP
- Japan
- Prior art keywords
- reel
- radius
- winding
- winding reel
- motor
- 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
Links
Abstract
PURPOSE:To correctly detect the radius of both reels and to attain a high speed re-winding even after a power source is inputted again by detecting the radius ratio of a supply reel and a winding reel and the number of the rotations of the winding reel and calculating the radius of the winding reel and the supply reel. CONSTITUTION:The tachopulse of a supply reel motor 1, a winding reel motor 2 and tachometers 3 and 4 is inputted to a radius ratio detector 5, and the radius ratio of a supply reel 101 and a winding reel 102 is detected. The tachometer 4 of the winding reel motor 2 is sent to a rotation number detector 6 and the number of the rotations of the winding reel 102 is detected. The output of the radius ratio detector 5 and the rotation number detector 6 is sent to a radius computing element 7 and the radius of the supply reel 101 and the winding reel 102 is operated. After inertia computing elements 8 and 9 are passed, it is added with the output of a speed controller 14 and a tension controller 15 by current computing elements 10 and 11, and by motor driving circuits 12 and 13, the supply reel motor 1 and the winding reel motor 2 are driven and controlled. Thus, even after the power source is inputted again, the reel radius can be correctly detected, and the high speed re-winding can be executed.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62179973A JPS6425331A (en) | 1987-07-21 | 1987-07-21 | Reel radius detecting circuit for magnetic tape device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62179973A JPS6425331A (en) | 1987-07-21 | 1987-07-21 | Reel radius detecting circuit for magnetic tape device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6425331A true JPS6425331A (en) | 1989-01-27 |
Family
ID=16075218
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62179973A Pending JPS6425331A (en) | 1987-07-21 | 1987-07-21 | Reel radius detecting circuit for magnetic tape device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6425331A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6622113B2 (en) | 2001-06-21 | 2003-09-16 | International Business Machines Corporation | Method and apparatus for detecting and computing tape reel radius using low-resolution angular position sensors |
-
1987
- 1987-07-21 JP JP62179973A patent/JPS6425331A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6622113B2 (en) | 2001-06-21 | 2003-09-16 | International Business Machines Corporation | Method and apparatus for detecting and computing tape reel radius using low-resolution angular position sensors |
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