| 摘要 |
PURPOSE:To equalize flying speed of ink jet, by a method wherein maximum voltage of drive pulse applied to electro-mechanical converting element installed corresponding to jet chambers of a multi-nozzle injection recording apparatus is adjusted in each jet chamber. CONSTITUTION:If pulse is supplied on signal line S1 from drive pulse control unit, a transistor Tr1 is rendered conductive and then Tr2 is done. If a transistor Tr8 is rendered conductive, voltage adjusted to any amount by a variable resistor RC11 for adjusting piezo-electric element applying voltage is applied to a piezo-electric element 4-1, and ink liquid drop is injected. Then the flying speed of ink liquid drop is adjusted according to amount of voltage applied to the piezo-electric element. Since rise time of pulse applied to the piezo-electric element is determined by variable resistors RC11 and RC21, the variable resistor RC11 is varied to adjust voltage and then the resistor RC21 is varied, thereby rise time of the pulse applied to the piezo-electric element is always set to optimum value. |
