| 摘要 |
PURPOSE:To provide said device which can always conduct optimized deflection amount control by preparing a feedback control circuit which inputs the output of the integral circuit of a deflection detecting device with an integral circuit connected with each of three charge detecting electrodes in a special condition. CONSTITUTION:Said device provides an ink particle defelction detecting device with an integrated circuit 231, 232, 233 connected with each of the 2nd, the 3rd charge detecting electrodes 62, 63 which limit, within a specified narrow width, cources of ink particles going forward to the 1st charge detecting electrode 6, arranged in the flying courses of electrically charged ink particles and a feedback contorl circuit 28 for the ink pressure by a pump 3. When one of circuits 232, 233 output as an input the output of the signals which indicate arrival of ink particles, the circuit 28 araises the operating speed of a pump, when the other is output, the circuit decreases the ink pressure of the pump and when the circuit 231 output, it operates to fix the ink pressure. |
