| 摘要 |
PURPOSE:To display the exchanging time of ink tanks by detecting the amount of residual ink by a method in which the number of pulse signal to discharge a liquid and the number of recovering operation times for a liquid path are counted, and the amount of ink to be used is calculated. CONSTITUTION:The number of signal pulse to discharge ink droplets and the number of recovering operation times are counted. In this case, assuming the one-time consumption of ink for each to be volume A and volume B, total amount S of ink is S=A+B. At a time when the total amount of ink used comes near the volume of ink in an ink tank, a display to notify the exchange of ink tanks is made, and thereby the exchange time of the ink tank can be known the consumption of ink can also be displayed all the time or every several steps. |
