Investigating the Dimensional and Geometric Accuracy of Laser-Based Powder Bed Fusion of PA2200 (PA12): Experiment Design and Execution

Variation management in additive manufacturing (AM) is progressively more important as technologies are implemented industrial systems; hence massive research efforts focused on the modeling and optimization of process parameters effect final part quality. These are, however, hampered by very problem they seeking to solve, conclusions weakened poor validity, reliability, repeatability. This paper details an elaborate experiment design subsequent execution with aim making data available without loss validity. Test artifacts were designed allocated fixed positions orientations a grid pattern within build chamber facilitate rigid analysis between different builds chamber. A total 507 specimens produced over three laser sintering PA12 before inspection coordinate measuring machine. demonstrates inherent variations laser-based powder bed fusion polymers (LB-PBF/P) that must be considered designs account for noise factors. In particular, results indicate position xy-plane has major influence geometric accuracy, while z-direction appears less influential.