Comparative study about dimensional accuracy and form errors of FFF printed spur gears using PLA and Nylon

In the present paper comparison of dimensional accuracy and form errors FFF (Fused Filament Fabrication) 3D printed spur gears obtained in two different polymeric materials (PLA Nylon-PA6) is presented. Two types were designed printed, having module teeth number. First, gear modelling process The printing parameters defined for both materials. Then, measuring processes described. Using method sector span, base circular thickness pitch determined. Additionally, root tip diameters measured, their roundness concentricity analysis results shows that, general, PLA allows obtaining better than Nylon. Nylon parts, which with lower infill ratio parts showed from errors.