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JPS5783481A - Printer - Google Patents

Printer

Info

Publication number
JPS5783481A
JPS5783481A JP15983780A JP15983780A JPS5783481A JP S5783481 A JPS5783481 A JP S5783481A JP 15983780 A JP15983780 A JP 15983780A JP 15983780 A JP15983780 A JP 15983780A JP S5783481 A JPS5783481 A JP S5783481A
Authority
JP
Japan
Prior art keywords
hammers
printing
optical path
signal
type drum
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
Application number
JP15983780A
Other languages
Japanese (ja)
Inventor
Fumio Suzuki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP15983780A priority Critical patent/JPS5783481A/en
Publication of JPS5783481A publication Critical patent/JPS5783481A/en
Pending legal-status Critical Current

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  • Impact Printers (AREA)

Abstract

PURPOSE: To prevent dispersion of timing and to improve printing quality by method wherein the dispersion of printing timing in an impact printer is detected by an optical instrument provided between a type drum and a row of hammers and corrective drive is carried out by the signal.
CONSTITUTION: A light projector 81 and a light receiver 82 made of photodiodes are arranged between the type drum 1 and the row of hammers 2 so that an optical path D parallels the axis of the type drum 1. This optical path D is designed so that it is interrupted when a hammner 21 comes in printing operation and takes a position 21'. First of all, a printing instuction signal is inputted into the driving circuit of electromagnets 4, 160 sets of electromagnets 4, movable levers 3 and hammers 21 are operated by this signal, times until each hammer interrupts the optical path are measured respectively and the respective differences of time are obtained. The dispersed values obtained are adjusted for correction so that timings of signals inputted to the driving circuit can be arranged and printed on the basis of the average time.
COPYRIGHT: (C)1982,JPO&Japio
JP15983780A 1980-11-13 1980-11-13 Printer Pending JPS5783481A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15983780A JPS5783481A (en) 1980-11-13 1980-11-13 Printer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15983780A JPS5783481A (en) 1980-11-13 1980-11-13 Printer

Publications (1)

Publication Number Publication Date
JPS5783481A true JPS5783481A (en) 1982-05-25

Family

ID=15702319

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15983780A Pending JPS5783481A (en) 1980-11-13 1980-11-13 Printer

Country Status (1)

Country Link
JP (1) JPS5783481A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4664543A (en) * 1983-08-02 1987-05-12 International Business Machines Corporation Device for monitoring and compensating for changes in the flight time of the print hammers of impact printers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4664543A (en) * 1983-08-02 1987-05-12 International Business Machines Corporation Device for monitoring and compensating for changes in the flight time of the print hammers of impact printers

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