JPS6429164A - Picture scanner - Google Patents
Picture scannerInfo
- Publication number
- JPS6429164A JPS6429164A JP18616187A JP18616187A JPS6429164A JP S6429164 A JPS6429164 A JP S6429164A JP 18616187 A JP18616187 A JP 18616187A JP 18616187 A JP18616187 A JP 18616187A JP S6429164 A JPS6429164 A JP S6429164A
- Authority
- JP
- Japan
- Prior art keywords
- subscanning
- control
- speed
- picture
- main scanning
- 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
Landscapes
- Facsimile Scanning Arrangements (AREA)
Abstract
PURPOSE:To obtain high scanning accuracy by detecting the speed of main scanning and using it as a reference input for subscanning control so as to eliminate need for expensive and high accurate servo motor and servo amplifier for the main scanning and subscanning control system and even when a conventional motor is used. CONSTITUTION:An external clock of a subscanning control section 108 is switched to a main scanning rotary signal 1-d being the output of a rotary encoder 102 only during the picture drawing (scanning) period to control a pulse motor 105. The speed of the subscanning is controlled in response to the speed of the main scanning to make the drawn picture width constant. In the subscanning control during a period when no picture is drawn, since the pulse motor is controlled by using an output pulse 1-e from the reference clock generator 110, the various control such as low speed movement, high speed acceleration/deceleration movement, movement of designated quantity or return are realized easily and the picture scanner having a high scanning accuracy is obtained without needing highly accurate drive control.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18616187A JPS6429164A (en) | 1987-07-24 | 1987-07-24 | Picture scanner |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18616187A JPS6429164A (en) | 1987-07-24 | 1987-07-24 | Picture scanner |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6429164A true JPS6429164A (en) | 1989-01-31 |
Family
ID=16183453
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18616187A Pending JPS6429164A (en) | 1987-07-24 | 1987-07-24 | Picture scanner |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6429164A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56132866A (en) * | 1980-03-21 | 1981-10-17 | Ricoh Co Ltd | Drum type scanner |
-
1987
- 1987-07-24 JP JP18616187A patent/JPS6429164A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56132866A (en) * | 1980-03-21 | 1981-10-17 | Ricoh Co Ltd | Drum type scanner |
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