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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