| 摘要 |
PROBLEM TO BE SOLVED: To adequately execute ink ejection and to obtain a high quality and stable image by a method wherein bubbles in ink is detected and an optimum head recovering operation is executed. SOLUTION: This ink jet printer a print head 31, a head driving circuit 32 for driving the print head 31, a bubble detecting circuit 38 and a switching circuit 34 that switches connections from the head 31 to the head driving circuit 32 and to the bubble detecting circuit 38. The bubble detecting circuit 38 consists of an impedance measuring circuit 33 which can be switched to be connected to the head 31, a CPU 35, a memory 36 and a table memory 37. |
