Droplet deviation modeling and compensation scheme of inkjet printing
Droplet deviation modeling and compensation scheme of inkjet printing
复制标题
喷墨打印墨滴偏差建模及补偿方案
DOI：
10.1007/s00170-014-6224-6
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发表时间：
2014-12-01
影响因子：
3.4
通讯作者：
Fu, Guo-qiang
中科院分区：
文献类型：
--
作者：
Jin, Yu-an;He, Yong;Fu, Guo-qiang
墨滴定位精度是影响喷墨印刷工艺沉积质量的重要因素，墨滴定位精度对墨滴的成形性能和印刷效率起着至关重要的作用。然而，由于大多数研究者主要集中在墨滴与承印物相互作用的动力学和力学方面，以提高印刷精度，因此对各种因素引起的墨滴偏移很少进行专门研究。事实上，在所有影响液滴偏离的因素中，喷嘴与基板之间的相对运动往往会导致喷射的液滴偏离其期望位置，并且只要存在水平速度，偏离就不可避免。在目前的大多数研究中，由于假设喷嘴和基底之间的相对水平速度较低，因此由这种现象带来的误差通常可以忽略不计。但是，保持相当低的水平平移速度并不总是可以接受的，这将导致打印效率低下。为了满足喷墨打印对效率和精度的要求，本文提出了一些策略来减轻上述现象的液滴偏离。本文提出了一种基于前瞻算法的喷嘴进给速度自适应控制方法，根据进给速度曲线和刀具轨迹的几何特征，通过预先预测刀具轨迹的偏差来补偿刀具轨迹的误差。在充分考虑液滴偏差影响的不同情况下，建立了误差模型，并将其融入到喷嘴进给速度的控制过程中。实际应用证明了该方法的有效性和可行性。
The depositing quality accomplished by inkjet printing process is significantly affected by droplet positioning accuracy which plays an essential role in formation performance and printing efficiency. However, the droplet deviation induced by various factors is rarely studied specifically because most researchers mainly concentrate on the dynamics and mechanics of droplet and ink-substrate interaction to enhance the printing precision. In fact, among all the contributing factors to droplet deviation, the relative motion between nozzle and substrate tends to cause the ejected droplet to deflect from its desired position and the deviation is inevitable as long as the existence of horizontal velocity. The error brought about by this phenomenon is commonly negligible in the majority of current studies with the assumption of slow relative horizontal speed between nozzle and substrate. But it is not always acceptable to keep a quite low horizontal translation speed which would result in inefficiency of printing. In order to satisfy the demanding requirements in efficiency and accuracy of inkjet printing, some strategies are proposed to mitigate the droplet deviation out of the above phenomenon in this paper. An adaptive approach to nozzle feedrate control with a look-ahead algorithm is presented in this paper to compensate the errors by means of reconstructing the tool paths with deviation prediction in advance based on the feedrate profile and the geometrical characteristics of tool paths. The error model is established with full consideration of different circumstances influenced by droplet deviation and is subsequently integrated into the control process of the nozzle feedrate. The practical implementation demonstrates the effectiveness and feasibility of the proposed method.