Abstract
This paper proposes an improved height profile model for drop-on-demand 3D printing with UV curable ink. It is extended from a previously validated model and computes height profile indirectly from volume and area propagation to ensure volume conservation. To accommodate multi-layer printing of 2D patterns, volume change and area change within a region of interest are modeled as piecewise functions of height differences before and after drop deposition. Model coefficients are experimentally obtained and validated with bootstrapping of experimental samples. Six different drop patterns are experimentally validated. The RMS height profile errors for multi-layer 2D patterns from the proposed model are consistently smaller than existing models from literature and are on the same level as multi-layer 1D patterns reported in our previous publication.
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