JPS6472855A - Printing hammer driving method - Google Patents

Printing hammer driving method

Info

Publication number
JPS6472855A
JPS6472855A JP23021987A JP23021987A JPS6472855A JP S6472855 A JPS6472855 A JP S6472855A JP 23021987 A JP23021987 A JP 23021987A JP 23021987 A JP23021987 A JP 23021987A JP S6472855 A JPS6472855 A JP S6472855A
Authority
JP
Japan
Prior art keywords
capacitor
voltage
energy accumulated
power supply
printing hammer
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
JP23021987A
Other languages
Japanese (ja)
Inventor
Yoshikiyo Futagawa
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.)
Seiko Epson Corp
Original Assignee
Seiko Epson Corp
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 Seiko Epson Corp filed Critical Seiko Epson Corp
Priority to JP23021987A priority Critical patent/JPS6472855A/en
Publication of JPS6472855A publication Critical patent/JPS6472855A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J9/00—Hammer-impression mechanisms
    • B41J9/44—Control for hammer-impression mechanisms

Landscapes

  • Impact Printers (AREA)

Abstract

PURPOSE:To reduce wasteful power consumption for a drive circuit of a printing hammer by providing a constitution in which energy accumulated in a coil is transferred to an accumulation means, a voltage of the accumulation means is controlled by a chopping means so that it is maintained at almost a constant level and thereby energy is returned to a power supply. CONSTITUTION:A capacitor 30 accumulates energy accumulated in coils CL1-CLn through diodes D1-Dn. A comparator 31 compares a voltage of the capacitor 30 with a voltage obtained by dividing a voltage of a power supply 1 as a reference, and discharges an output signal until the voltage of the capacitor 30 exceeds a prearranged value. When the oscillation of a blocking oscillator 36 continues, the energy accumulated in the capacitor 30 from an output winding of a transformer 38 through a diode 42 is transferred to and accumulated in a capacitor 4 of a power supply 1. That is, the energy accumulated in the coils CL1-CLn is discharged when the capacitor 30 accumulates it beyond a prearranged level. As a result, the voltage becomes constant and therefore, it does not adversely affect the action of a printing hammer.
JP23021987A 1987-09-14 1987-09-14 Printing hammer driving method Pending JPS6472855A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23021987A JPS6472855A (en) 1987-09-14 1987-09-14 Printing hammer driving method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23021987A JPS6472855A (en) 1987-09-14 1987-09-14 Printing hammer driving method

Publications (1)

Publication Number Publication Date
JPS6472855A true JPS6472855A (en) 1989-03-17

Family

ID=16904423

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23021987A Pending JPS6472855A (en) 1987-09-14 1987-09-14 Printing hammer driving method

Country Status (1)

Country Link
JP (1) JPS6472855A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002307766A (en) * 2002-04-02 2002-10-23 Seiko Epson Corp Head drive circuit of impact printer

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS644361A (en) * 1987-06-26 1989-01-09 Fujitsu Ltd Energy reusing system in printing head

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS644361A (en) * 1987-06-26 1989-01-09 Fujitsu Ltd Energy reusing system in printing head

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002307766A (en) * 2002-04-02 2002-10-23 Seiko Epson Corp Head drive circuit of impact printer

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