Research Article
Optimization of Surface Roughness in Drilling Medium-Density Fiberboard with a Parallel Robot
Table 4
The results of experiments and S/N ratio values.
| Experiment no. | Control factors | Surface roughness, Ra (μm) | S/N ratio for Ra (dB) | A | B | C | Point angle (α) | Cutting speed (V) | Feed rate (f) |
| 1 | 118 | 15.7 | 0.01 | 3.08 | −-9.7710 | 2 | 118 | 15.7 | 0.03 | 4.072 | −12.1962 | 3 | 118 | 15.7 | 0.05 | 4.862 | −13.7363 | 4 | 118 | 31.4 | 0.01 | 2.479 | −7.8855 | 5 | 118 | 31.4 | 0.03 | 3.269 | −10.2883 | 6 | 118 | 31.4 | 0.05 | 4.186 | −12.436 | 7 | 118 | 47.1 | 0.01 | 2.122 | −6.5349 | 8 | 118 | 47.1 | 0.03 | 2.883 | −9.1968 | 9 | 118 | 47.1 | 0.05 | 3.486 | −10.8465 | 10 | 135 | 15.7 | 0.01 | 3.837 | −11.6798 | 11 | 135 | 15.7 | 0.03 | 4.886 | −13.7791 | 12 | 135 | 15.7 | 0.05 | 5.864 | −15.3639 | 13 | 135 | 31.4 | 0.01 | 3.249 | −10.235 | 14 | 135 | 31.4 | 0.03 | 3.975 | −11.9867 | 15 | 135 | 31.4 | 0.05 | 4.758 | −13.5485 | 16 | 135 | 47.1 | 0.01 | 3.029 | −9.6259 | 17 | 135 | 47.1 | 0.03 | 3.43 | −10.7059 | 18 | 135 | 47.1 | 0.05 | 4.212 | −12.4898 |
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