Fuzzy Linguistic Optimization on Surface Roughness for CNC Turning

Table 7

Parameters and levels.

Parameter	Level
	Level 1	Level 2	Level 3
A: speed ($\text{m}/\min \hspace{0.17em}$)	150	200	250
B: cutting depth ($\text{mm}$)	1	2	3
C: feed rate ($\text{mm}/\text{rev}$)	0.2	0.3	0.4
D: tool nose runoff ($\text{mm}$)	$-0.1$	$\pm 0.03$	0.1