Table 4 Significance evaluation of each factor.
Factor | Sj | Degrees of freedom | Sj/Degrees of freedom | F | Critical value | Significance |
|---|---|---|---|---|---|---|
Traverse speed | 299.4 | 4 | 74.9 | 89.09 | F0.05(4,24) = 2.78 | Significant |
Cutting times | 103.8 | 2 | 51.9 | 61.747 | F0.05(4,24) = 3.40 | Significant |
Standoff distance | 58.1 | 4 | 14.5 | 17.30 | F0.05(4,24) = 2.78 | Significant |
Pump pressure | 36.3 | 2 | 18.2 | 21.62 | F0.05(2,24) = 3.40 | Significant |
Nozzle diameter | 11.7 | 2 | 5.8 | 6.95 | F0.05(2,24) = 3.40 | Significant |
Empty column | 3.6 | 4 | 0.9 | 1.07 | F0.05(4,24) = 2.78 | |
Error | 16.8 | 6 | 0.8 |
