Table 1.

FDM process parameters with their respective levels.

Factors			Levels
Name	Units	Symbol	Low (−)	High (+)
Air gap	mm	A	−0.0254	0.0000
Raster width	mm	B	0.4064	0.7814
Raster angle	degree	C	0.0000	90.0000
Contour number	-	D	1.0000	5.0000
Contour width	mm	E	0.4064	0.7814