JPS5622184A - Malfunction detecting system for serial printer - Google Patents
Malfunction detecting system for serial printerInfo
- Publication number
- JPS5622184A JPS5622184A JP9848079A JP9848079A JPS5622184A JP S5622184 A JPS5622184 A JP S5622184A JP 9848079 A JP9848079 A JP 9848079A JP 9848079 A JP9848079 A JP 9848079A JP S5622184 A JPS5622184 A JP S5622184A
- Authority
- JP
- Japan
- Prior art keywords
- print head
- generated
- count pulse
- 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
Links
Abstract
PURPOSE: To detect immediately the printing malfunction, by collating the count pulse which is generated in accordance with the rotation of the print head with the print check signal generated synchronously with the count pulse.
CONSTITUTION: Signal converting circuit 26 generates "1" or "0" in accordance with the output signal of present-position counter 12 at the moment the count pulse is generated, and then inverts "1" and "0" with every two units of the count pulse. At the same time, the initial state is set to the phase of the print check signal which is obtained when the selection of print head 3-1 is carried out properly. Accordingly, the coincidence must always be obtained through the collation given by coincidence detecting circuit 27 between the print check signal of register 25 and the output of signal converting circuit 26 and in case the count pulses are generated normally and counted. In this connection, the output is obtained through circuit 27 in case no coincidence is obtained through the collation given every 1/2 pitch of the rotation of the print head. Thus the fault is informed to the external control unit, and then the hammer action of e.g. print head 3-1 is discontinued to prevent the printing of wrong characters.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9848079A JPS5622184A (en) | 1979-07-31 | 1979-07-31 | Malfunction detecting system for serial printer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9848079A JPS5622184A (en) | 1979-07-31 | 1979-07-31 | Malfunction detecting system for serial printer |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5622184A true JPS5622184A (en) | 1981-03-02 |
Family
ID=14220809
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9848079A Pending JPS5622184A (en) | 1979-07-31 | 1979-07-31 | Malfunction detecting system for serial printer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5622184A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5087134A (en) * | 1989-04-07 | 1992-02-11 | Oki Electric Industry Co., Ltd. | Method of and device for printer control |
-
1979
- 1979-07-31 JP JP9848079A patent/JPS5622184A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5087134A (en) * | 1989-04-07 | 1992-02-11 | Oki Electric Industry Co., Ltd. | Method of and device for printer control |
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