There was a strong correlation between the processing temperature and the morphology of nylon-12 fibers. Lower processing temperatures and collector speeds below the CTS were observed to lead to arches formed in the resulting fibers. When the temperature processing conditions tended towards rapid fiber solidification, bead-like fibers were obtained, and when the jet solidification is slowed down, smooth fibers were obtained. Notably, stable and well-defined MEW samples were printed not only with smooth fibers but also with bead-like fibers. The MEWron printer could accurately deposit nylon-12, stack multiple layers, and reproducibly fabricate porous samples, including both square and non-straight patterns including a sinusoidal and auxetic structure. In all cases, continuous, stable, and defect-free fabrication was achieved, enabling the reliable processing of samples measuring several centimeters in size. While the cylindrical