*Levels | S/N ratio | ||
Rotational Speed (rpm) | Welding Speed (mm/min) | Axial Load (kN) | |
1 | 33.85 | 32.72 | 33.03 |
2 | 32.23 | 34.67 | 33.71 |
3 | 34.60 | 33.28 | 33.93 |
Max-min | 2.37 | 1.95 | 0.89 |
Rank | 1 | 2 | 3 |