| Experiment runs | voltage | current | Welding speed | Undercut sizes, mm |
| 1 | 1 | 1 | 1 | 0.08 |
| 2 | 1 | 2 | 2 | 0.05 |
| 3 | 1 | 3 | 3 | 0.12 |
| 4 | 2 | 1 | 3 | 0.03 |
| 5 | 2 | 2 | 1 | 0.15 |
| 6 | 2 | 3 | 2 | 0.09 |
| 7 | 3 | 1 | 2 | 0.11 |
| 8 | 3 | 2 | 3 | 0.07 |
| 9 | 3 | 3 | 1 | 0.06 |