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Nozzle drive control system and method for ink jet printing

  • US 5,432,541 A
  • Filed: 07/20/1992
  • Issued: 07/11/1995
  • Est. Priority Date: 03/31/1989
  • Status: Expired due to Term
First Claim
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1. A method of determining a magnitude of an exciting voltage to be applied to a nozzle of an ink jet printer to break a stream of ink into droplets for printing comprising the steps of:

  • (a) applying an exciting voltage having a minimum value to said nozzle to break said stream into droplets;

    (b) slowly increasing the magnitude of said exciting voltage from said minimum value;

    (c) detecting and recording an exciting voltage value, C(L), at which the number of droplets per unit time doubles;

    due to the formation of intermediate (non-merging) satellite droplets;

    (d) detecting and recording an exciting voltage value, C(H), at which droplet formation first occurs closest to the nozzle as said exciting voltage is slowly increased from said exciting voltage value C(L); and

    (e) calculating an exciting voltage V(CALC) for printing according to the equation;

    
    
    space="preserve" listing-type="equation">V(CALC)=alpha[C(L)+C(H)]/2where alpha is a value related to the ink.

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