JPS55105834A - Detecting method for tape roll-in - Google Patents
Detecting method for tape roll-inInfo
- Publication number
- JPS55105834A JPS55105834A JP906779A JP906779A JPS55105834A JP S55105834 A JPS55105834 A JP S55105834A JP 906779 A JP906779 A JP 906779A JP 906779 A JP906779 A JP 906779A JP S55105834 A JPS55105834 A JP S55105834A
- Authority
- JP
- Japan
- Prior art keywords
- tape
- value
- output
- roll
- comparator
- 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.)
- Granted
Links
Abstract
PURPOSE: To secure the detection of the tape roll-in by giving the comparison between the value obtained by converting the rotational frequency of the reel turntable into the electric signal and the value obtained by making the converted value mentioned above pass through the LPF, thus realizing the simple and low-cost manufacture along with the miniaturization.
CONSTITUTION: The output of D/A converter 6 is equal to that of LPF7 when the tape is running under the steady condition, and thus no output is caused from comparator 8. In case the tape is rolled in, take-up reel turntable 2 stops its rotation at the beginning of the tape roll-in and then starts the backward rotation. The small diameter of the capstan increases immediately with start of the roll-in of the tape, and accordingly the substantial running speed of the tape increases. As a result, the rotational frequencies of take-up reel turntables 1 and 2 increase, and the value larger than the steady running time of the sum proportional to the rotational frequencies of turntables 1 and 2 is supplied to one input end of comparator 8. While the output of LPF7, i.e., the value before roll-in of the tape is supplied to the other input end, and this value is smaller than the value of converter 6. As a result, comparator 8 generates the output to discontinue the operation of the mechanism.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54009067A JPS5923020B2 (en) | 1979-01-31 | 1979-01-31 | How to detect tape entanglement |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54009067A JPS5923020B2 (en) | 1979-01-31 | 1979-01-31 | How to detect tape entanglement |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55105834A true JPS55105834A (en) | 1980-08-13 |
JPS5923020B2 JPS5923020B2 (en) | 1984-05-30 |
Family
ID=11710257
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP54009067A Expired JPS5923020B2 (en) | 1979-01-31 | 1979-01-31 | How to detect tape entanglement |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5923020B2 (en) |
-
1979
- 1979-01-31 JP JP54009067A patent/JPS5923020B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS5923020B2 (en) | 1984-05-30 |
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