In this work a 3D printing system based on the use of stereolithography and able to print parts made of two materials is studied. The 3D printing problem is divided into two subproblems. First, the problem of locating UV light emitters capable of reaching all areas of the polymer that constitutes the part to be printed is analyzed with the goal of minimizing the number of used emitters. Next, for each layer of the part the selected emitters are assigned to the areas of the polymer to be reached, with the goals of maximizing the angle of incidence of the UV light on the printing plane and minimizing the number of emitters that need to be activated. Integer linear formulations were introduced in an earlier work for both problems. Here these models are revisited and heuristic and exact methods are developed. Finally, the formulations and methods are analyzed for a case study. The results of the computational experiments are presented and discussed.

中文翻译：

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使用检流计扫描仪进行双材料3D打印

在这项工作中，研究了一种基于立体光刻技术并且能够打印由两种材料制成的零件的3D打印系统。3D打印问题分为两个子问题。首先，以最小化使用的发射器的数量为目标，分析了定位能够到达构成要印刷的部件的聚合物的所有区域的UV发射器的问题。接下来，对于零件的每一层，将选定的发射器分配给要到达的聚合物区域，其目标是使UV光在印刷平面上的入射角最大，并最大程度地减少需要发射的发射器的数量。活性。较早的工作针对这两个问题引入了整数线性公式。在这里重新审视这些模型，并开发启发式和精确的方法。最后，分析配方和方法以进行案例研究。给出并讨论了计算实验的结果。