Projection micro stereolithography (PµSL) is an additive manufacturing tool that offers multiple advantages, including unparalleled resolution and throughput, but the ability to print high viscosity resin for large-scale parts is limited. One of the key challenges in PµSL is to separate a newly polymerized layer from the vat floor without damaging the part. Since the separation force scales with the printing area, the risk of damaging the part increases significantly with larger-scale systems and must be addressed. In this paper, a novel roll-to-roll, variable tensioning system is proposed to reduce the separation force during printing. A mathematical model is proposed to predict the separation force for different 2D geometries, and a set of experiments is conducted on an experimental prototype to validate the model. The effects of different separation parameters including peel rate and peel angle are discussed in detail. The results show that the proposed tensioning system reduces the separation force significantly.

投影微立体平版印刷术（PµSL）是一种增材制造工具，具有多种优势，包括无与伦比的分辨率和生产量，但用于大规模零件的高粘度树脂印刷能力受到限制。PµSL的主要挑战之一是在不损坏零件的情况下将新聚合的层与缸底分开。由于分离力随印刷面积成比例，因此在较大规模的系统中损坏部件的风险显着增加，必须解决。本文提出了一种新颖的卷对卷可变张紧系统，以减少打印过程中的分离力。提出了数学模型来预测不同2D几何形状的分离力，并在实验原型上进行了一组实验以验证模型。详细讨论了剥离速率和剥离角度等不同分离参数的影响。结果表明，所提出的张紧系统显着减小了分离力。