| 摘要 |
PURPOSE:To reduce the distortion of printed images caused by the distortion of wave form by negatively feeding back an output of the oscillation sensor provided at a part of the ink jet head to the exciting circuit of the ink jet head and by keeping the driving oscillation wave form of ink jet head constant. CONSTITUTION:An output signal of the oscillation sensor 13 is introduced to the negative feedback circuit 15 to control the polarity and the quantity of feedback, and is fed to the ink jet head driving exciter circuit 12 to compensate the wave form of the ink jet head exciting signal. The wave form distortion of the exciting signal caused by both variations in the ink jet head 1 mechanism and the ink exciting piezo-electric element 2 can be compensated, a stable ink drop can be formed, and a disstortion free picture print can be obtained. |
