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Title:
SPEED CONTROL SYSTEM OF SERIAL PRINTER
Document Type and Number:
Japanese Patent JPS5688575
Kind Code:
A
Abstract:

PURPOSE: To provide print of high quality by comparing an output signal, which corresponds to the turning speed of a motor, to a signal that corresponds to the running speed of a print head, by assigning different speeds corresponding to kinds of characters, and by setting an intermediate speed state when high-speed print is changed into low-speed print.

CONSTITUTION: The system is provided with motor driving circuit 5 that controls motor 6 driving a print head and control part 7 that assigns the running speed of the print head. To print alphanumeric data at a high speed, head running speed VA is indicated to speed assigning circuit 2, a repetitive pulse signal that corresponds to speed VA is outputted from timer 3 and comparator 4 compares it with the turning speed of motor 6 to control driving circuit 5. Next, when the print of alphabets and numbers is completed and "kanji" (Chinese character) is to be printed, intermediate speed VM is indicated as the head running speed from control part 7 to circuit 2 and a repetitive pulse signal that corresponds to speed VM is outputted from timer 3; after comparator 4 detects the head running speed reaching speed VM, control part 7 indicates "kanji" print speed VK and controls motor 6.


Inventors:
KAMOI HISAAKI
Application Number:
JP16607779A
Publication Date:
July 18, 1981
Filing Date:
December 20, 1979
Export Citation:
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Assignee:
FUJITSU LTD
International Classes:
B41J2/51; B41J19/18; G06K15/10; (IPC1-7): B41J3/10; G06K15/10
Domestic Patent References:
JPS53108722A1978-09-21
JPS5257732A1977-05-12
JPS5559979A1980-05-06



 
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