Research on Temperature Control System of Ink Path of Inkjet Printer Based on Dynamic Matrix Control Algorithm

In order to reduce the influence of ink viscosity change on the printing effect, this paper explores the effect of ink temperature change on the viscosity of the ink, so as to control the ink temperature to change the ink molecular tension to achieve the purpose of adjusting the viscosity of the ink. According to the weak nonlinearity, large hysteresis and large inertia of the ink temperature control system, the conventional PID algorithm can not meet the requirements of printing quality. This paper proposes the temperature control strategy of dynamic matrix control (DMC) algorithm, which has strong The anti-interference ability, suppression overshoot, and small steady-state error overcome the influence of the variable pipeline environment on the ink ejection point. At the end of the paper, the simulation is carried out to verify that the control system has better robustness and suppression of overshoot than the conventional PID algorithm in terms of system response speed and suppression of overshoot. Not only improve the quality of the print, but also reduce the failure rate of the nozzle.