When nylon-12 was processed above the critical translation speed (CTS), and the collector temperature increased, but the processing temperature was still insufficient to maintain the melt in a liquid state for an adequate amount of time, bead-like fibers are obtained (Figure ). This behavior can be attributed to the heterogeneous jet viscosity due to fiber fast solidification and the deposition-induced pulling force, which together generate uneven forces on the fiber. This leads to the formation of a stable fiber that can be continuously printed and accurately deposited, but with "bead-like" morphologies. This effect was observed when nylon-12 was melted at 250°C, and the collector temperature was set to 70°C, even when the fiber was stretched several times above the CTS. The effect of the CTS and pulling force on bead-like fibers can be observed when comparing nylon-12 fibers printed under different speeds (Figure ). As the processing speed increases, the pulling force also increases, leading to fibers with a more elongated shape between beads.