Investigation and Process Parameter Optimization on Wire Electric Discharge Machining of Aluminium 6082 Alloy

Table 11

ANOVA for surface roughness.

Source	Sum of square	df	Mean	F valve	% of contribution
Model	8.86	9	0.98	39.78
A-pulse on	7.86	1	7.86	317.53	84.6
B-wire feed	2.35E − 04	1	2.35E − 04	9.49E − 03	0
C-pulse off	0.37	1	0.37	15.02	3.9
AB	2.88E-03	1	2.88E-03	0.12
AC	0.24	1	0.24	9.58	2.6
BC	1.63E − 05	1	1.63E − 05	6.60E − 04
A^2	0.37	1	0.37	15.03	3.9
B^2	3.58E − 04	1	3.58E − 04	0.014
C^2	0.017	1	0.017	0.7	1.8
Residual	0.42	17	0.025
Total	9.28	26