Figure 6. Surface roughness @ 45° (a) height profile and (b) distribution profile

From

How Surface Roughness Performance of Printed Parts Manufactured by Desktop FDM 3D Printer with PLA+ is Influenced by Measuring Direction

Mohammad S. Alsoufi, Abdulrhman E. Elsayed

American Journal of Mechanical Engineering. 2017, 5(5), 211-222 doi:10.12691/ajme-5-5-4