Method and apparatus for automatic setting of nozzle drive volta

Details Method and apparatus for automatic setting of nozzle drive volta Method and apparatus for automatic setting of nozzle drive volta

1995-05-16

1999-02-02

Fuller, Benjamin R.

Incremental printing of symbolic information

Ink jet

Ejector mechanism

347 73, 347 81, 347 82, 347 80, B41J 202, B41J 212, B41J 2105, B41J 2125

Patent

active

058671943

ABSTRACT:
A method and apparatus for accurately determining and setting the optimal nozzle drive voltage for an ink jet printer. The current carried by charged test drops is monitored by a sensing electrode and ammeter while the nozzle drive voltage is slowly varied between minimum and maximum points. A plot of drop current versus nozzle drive voltage provides an accurate determination of the good printing window for the particular nozzle under the operating conditions presented. This arrangement can be used for calibrating a new nozzle in an existing printer or for calibrating a new ink or font to ensure that operation will occur within the desired print window.

REFERENCES:
patent: 4060813 (1977-11-01), Yamada et al.
patent: 4878064 (1989-10-01), Katerberg et al.
patent: 5196860 (1993-03-01), Pickell et al.

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