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Table 5 Plan for central composite rotatable second-order design: different controlling parameters and results

From: Optimization of machining parameters and wire vibration in wire electrical discharge machining process

Experiment
No.
Wt Ws Fr Sv Response Aa (μm) Response Wk (μm)
1 -2 0 0 0 3.66540 71.5790
2 0 0 0 0 2.37396 68.0022
3 -1 1 1 -1 2.54925 68.3599
4 0 0 0 0 2.37396 68.0022
5 -1 -1 1 -1 2.93253 70.4804
6 -1 -1 -1 -1 2.70124 69.2480
7 2 0 0 0 2.17943 65.7750
8 0 0 0 0 2.37396 68.0022
9 -1 1 -1 -1 2.70124 69.2480
10 -1 1 -1 1 2.66031 69.1647
11 0 0 0 0 2.37396 68.0022
12 1 1 1 1 2.01800 66.6289
13 1 1 1 -1 1.84065 65.8024
14 0 2 0 0 2.51052 68.3176
15 0 0 -2 0 2.62025 68.8408
16 0 0 0 0 2.37396 68.0022
17 0 0 0 0 2.37396 68.0022
18 -1 -1 -1 1 2.66031 69.1647
19 0 0 0 -2 2.43437 68.1575
20 -1 1 1 1 2.83786 69.6149
21 0 0 0 2 2.60788 69.0435
22 -1 -1 1 1 2.95642 70.7109
23 1 -1 -1 -1 2.24741 67.2592
24 1 1 -1 -1 2.04350 66.4264
25 1 -1 -1 1 2.09522 66.7474
26 0 0 0 0 2.37396 68.0022
27 0 -2 0 0 2.55843 69.1749
28 0 0 2 0 2.64001 69.5402
29 1 1 -1 1 2.15603 66.9390
30 1 -1 1 -1 2.69919 69.1595
31 1 -1 1 1 2.61182 68.9616