Name of factors and measurement | Designation | Changing levels | Change interval ∆x | ||
−1 | 0 | +1 | |||
Brush drum rotation speed, rpm |
| 1100 | 1200 | 1300 | 100 |
Guide inclination angle, degree |
| 30 | 45 | 60 | 15 |
Mesh surface length, mm |
| 200 | 400 | 600 | 200 |