Circuit arrangement for synchronizing the times of occurrence of

Details Circuit arrangement for synchronizing the times of occurrence of Circuit arrangement for synchronizing the times of occurrence of

1979-11-19

1981-04-07

Eickholt, E. H.

Printing

Selective or progressive

Bed and platen machines

101 9329, 307498, 361169, B41J 792

Patent

active

042599032

ABSTRACT:
From the variables print hammer magnet voltage, print hammer magnet temperature, impact force, and a value derivable from the actual print time, a control voltage, which correspondingly delays an early trigger pulse by means of a variable delay element, is determined in an "open" control loop. The variables are analogously combined by adding, subtracting, and multiplying the analogue values, and by subsequently forming a weighted sum.

REFERENCES:
patent: 3712212 (1973-01-01), Beery
patent: 4027761 (1977-06-01), Quaif
patent: 4083299 (1978-04-01), Norton
patent: 4103617 (1978-08-01), O'Brien et al.
patent: 4149120 (1979-04-01), Richter
patent: 4156283 (1979-05-01), Gilbert
patent: 4162131 (1979-07-01), Carson, Jr., et al.
patent: 4189246 (1980-02-01), Kane et al.
patent: 4192230 (1980-03-01), Blom et al.
patent: 4200843 (1980-04-01), Egami et al.
"Programmed Amplitude Print Hammer Driver Circuit", IBM Tech. Discl. Bulletin, vol. 22, No. 4, Sep. 1979, pp. 1540-1541.
"Impact Force Compensation for Voltage Variations in the Hammer Firing Pulse in Impact Printer", IBM Tech. Discl. Bulletin, vol. 22, No. 5, Oct. 1979, pp. 1756-1758.
"Constant Energy Driver", IBM Tech. Discl. Bulletin, vol. 22, No. 3, Aug. 1979, pp. 968-969.
"Controller for Electromechanical Printhammer", IBM Tech. Discl. Bulletin, vol. 22, No. 8A, Jan. 1980, pp. 3294-3295.

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