Name and designation of factors | Change levels | Change interval | |||
−1 | 0 | +1 | |||
The number of revolutions of the saw drum (nab) rpm | X1 | 200 | 300 | 400 | 100 |
Between the saw and the brush drum distance (a) mm | X2 | 1 | 2 | 3 | 1 |
The angle of inclination of the guide (α) grad | X3 | 5 | 10 | 15 | 5 |