| 摘要 |
In an ink remaining amount checking routine to be performed at every one line of printing, when a flag indicative of the ink amount in a sub-tank less than or equal to a predetermined amount, an alarm is generated. Also, while the flag is set, predetermined number of lines capable of printing is performed. Thereafter, ink is supplied. By this, operator may check alarm for ink supply and perform ink supply at a predetermined time interval.
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