A push-mode piezo inkjet equivalent circuit model enhanced by diaphragm displacement measurements
A push-mode piezo inkjet equivalent circuit model enhanced by diaphragm displacement measurements
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DOI：
10.1063/1.5088384
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发表时间：
2019-02-01
期刊：
影响因子：
1.6
通讯作者：
Tokito, Shizuo
中科院分区：
文献类型：
--
作者：
Yoshida, Yasunori;Izumi, Konami;Tokito, Shizuo
本文报道了如何更好地预测推式压电喷墨技术的液滴喷射速度，通过升级传统的等效电路模型。传统模型的计算结果表明，在拉-推压电驱动模式下，不喷墨的驱动脉宽条件只周期性地存在。然而，实际上在任何脉冲宽度条件下观察到喷墨。用高精度电容位移计测量膜片相对于压电元件输入电压波形的位移，以校正实际测量值和计算值之间的差异。然后修改等效电路模型，使测量的膜片残余振荡可以表示。我们假设实际的喷墨打印头包含有效的弹簧振荡分量、有效的致动器质量和阻尼分量，其大于在常规等效电路模型计算中使用的阻尼分量。我们证明，计算结果和实际测量之间的差异可以减少。对等效电路模型的修改是基于添加具有与墨室柔量相同功能的有效机械弹簧振荡分量、对应于致动器质量的致动器惯性的增加以及表示阻尼振荡的有效电阻元件。(c)2019年作者。
This paper reports on ways to better predict droplet ejection velocity of push-mode piezo inkjet technology by upgrading the conventional equivalent circuit model. Calculation results from the traditional model imply that the driving pulse width conditions without ink ejection only periodically exist in the pull-push piezo driving mode. However, ink ejection is actually observed under any pulse width condition. The displacement of the diaphragm with respect to the piezo element input voltage waveform was measured with a highly accurate capacitive displacement gauge to correct for the difference between the actual measurements and calculations. The equivalent circuit model was then modified so that the measured diaphragm residual oscillations could be expressed. We presumed that an actual inkjet printhead contains an effective spring oscillation component, effective actuator mass, and damping component larger than that used in conventional equivalent circuit model calculations. We demonstrated that the difference between the calculated results and actual measurements could be reduced. Modifications to equivalent circuit model are based on the addition of an effective mechanical spring oscillation component having the same function as the ink chamber compliance, an increase in actuator inertance corresponding to the mass of the actuator, and an effective resistance element expressing a damped oscillation. (c) 2019 Author(s).