在光固化3D列印製程中，使用壓電噴頭噴印為目前最具能夠完成全彩的製程方式。在層與層的接合過程中，一層平面的完整性與平整性，關係著未來堆疊每層平面的重要性，其控制參數的設定會對一平面鋪層的墨滴形狀的穩定率有顯著的影響。本研究的目的是運用灰關聯分析應用於光固化3D彩色漸層製層參數優化之研究，研究中以墨滴直徑變異與墨滴形狀最大穩定率為品質目標，主要控制參數則結合噴頭高度、噴印速度及UV光照射時間。使用田口法直交表排出L9(34) 9組實驗，再將實驗結果以具多品質特性之優化的灰關聯來分析，找出實驗中最適化的平面堆疊參數，並進行確認與比較。本研究方法的確可有效減少墨滴直徑的變異與墨滴形狀穩定率的標準偏差，應用於彩色漸層結果說明田口灰關聯能有效率的在少量實驗中獲取多重品質要求之最佳組合參數。

In Photo-Curable 3D printing process, using piezo nozzle might be the best choice for a full-color objet printing currently. During the bonding process between two layers, each layer’s integrity and smoothness affects the quality of the each stacked layer. The control parameter settings have a significant effect on the flat laminate’s coverage. The purpose of this study is the use of Grey Relational Analysis (GRA) for Parameter Optimization of Gradient Color Process in a Photo-curable 3D Printing System. In this study, variation in droplet diameter and maximum coverage are chosen as quality objectives. The main control parameters include nozzle height, printing speed and UV light exposure time. The Taguchi method orthogonal array method L9(34) is employed to carry out nine sets of experiments. The GRA with optimization for multiple quality characteristics is used to find out the optimal experimental parameters for the plane accumulation. The confirmed results are also compared. This research method is indeed effective in reducing the standard deviation of the ink droplet diameter and coverage. The experimental results indicate that the associated Taguchi method and GRA can efficiently obtain the best combination of quality requirements for multiple parameters in a few experiments

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