| 摘要 |
An ink circulating unit is configured by including an ink head for spraying ink, a first tank, which is arranged upper than the ink head in a gravitational direction, for storing the ink to be supplied to the ink head, a second tank, which is arranged lower than the ink head in the gravitational direction, for storing the ink not sprayed from the ink head, and a pump for conveying the ink within the second tank to the first tank. A first step of driving the pump for a predetermined amount of time in a state where the first tank is sealed, and a second step of stopping the pump for a predetermined amount of time in a state where the air within the first tank is released are executed to fill the ink head with the ink.
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