Surface Roughness Modeling of Material Extrusion PLA Flat Surfaces
Table 2
The linear and exponential models, as well as the statistical data for 0, 45, and 90 degrees of observed orientation concerning PLA thermoplastic printing lines.
Degree
Theoretical model*
Multiple R
R Square
Standard Error
ANOVA -value
0
0.70
0.48
0.89
0.306
0.74
0.54
0.34
0.232
45
0.90
0.82
0.23
0.025
0.92
0.86
0.02
0.014
90
0.98
0.95
0.52
0.001
0.98
0.97
0.03
<0.001
*Those parameters were defined in Section 2.2, specifically on equations (1) and (2).
