Multiple Regression Prediction Model for Cutting Forces in Turning Carbon-Reinforced PEEK CF30

Table 2

Machining parameters and their levels.

	level	code
Cutting speed (m/min)	300	1
	200	2
	100	3
Depth of cut (mm)	1.5	1
	0.75	2
	0.25	3
Feed rate (mm/rev)	0.20	1
	0.15	2
	0.10	3