| 摘要 |
PROBLEM TO BE SOLVED: To provide an ink jet printer capable of calculating ink residual quantity without increasing cost and a host device thereof. SOLUTION: In an ink jet printer equipped with a means calculating ink residual quantity, the initial amt. of ink, an ink consumption amt. per a unit emitting value and the unit cleaning ink consumption amt. per one time of head cleaning are stored in an ROM 9 and, when an ink cartridge 7 is replaced, a control part 3 transfers the initial amt. to a register 5 as an ink residual amt. to calculate an emitting value from printing data at every reception of the printing data and calculates an ink consumption amt. from the emitting value and the ink consumption amt. per a unit emitting value amt. and, from the number of times of head cleaning and a unit cleaning ink consumption amt., a cleaning ink consumption is calculated to renew the ink residual amt. and, when the ink residual amt. becomes a predetermined amt., a display 8 is allowed to light. |
