Minimization of Surface Roughness and Tool Vibration in CNC Milling Operation

Table 8

Results of conformity test.

Specimen number	Coded parameter			Surface roughness ()			Tool life (Min)			Vibration amplitude (mm/sec^2)
				Actual value	Predicted value	Error % age	Actual value	Predicted value	Error % age	Actual value	Predicted value	Error % age
1	143	0.1	1.25	0.183	0.18998	−3.6	18.4	19.2948	−4.63	18	17.772	1.2
2	143	0.1	1.25	0.191	0.18998	0.56	18.8	19.2948	−2.54	17	17.772	−4.3
3	143	0.1	1.25	0.186	0.18998	−2.09	18.6	19.2948	−3.6	18	17.772	1.2