Modelling Structural Behaviour of the Cartesian, Polar, and Delta Material Extrusion Printers by Finite Element Analysis

This study delves into the impact of deformation and vibrations on the precision of prints in material extrusion 3D printers across three spatial configurations: cartesian, polar, and delta, with a particular emphasis on how these printers distort under their own structural weight. Employing a combination of computer-aided design models and finite element method analysis, the research undertakes structural static, transient, and modal analyses to comprehensively assess the printer’s behaviour. The results reveal interesting patterns; while the polar printer demonstrates the least deformation, trailed by the delta and cartesian printers in the static structural analysis, modal analysis uncovers that the cartesian printer exhibits the narrowest range of vibration frequencies, while the range expands for delta and peaks for polar printers. By scrutinizing this previously unexplored area, the study fills a crucial gap in existing literature, highlighting the structural implications for printing parameters as deformation increases in material extrusion printers. Ultimately, this research offers valuable insights into optimizing printer configurations to enhance print accuracy, thereby contributing to advancements in additive manufacturing technology.