Research Article
Optimization of Surface Roughness in Drilling Medium-Density Fiberboard with a Parallel Robot
Table 5
The S/N response table for Ra factor.
| Level | Control factors | Surface roughness (Ra) | A | B | C |
| Level 1 | −10.321 | −12.754 | −9.289 | Level 2 | −12.157 | −11.063 | −11.359 | Level 3 | — | −9.900 | −13.070 | Delta | 1.836 | 2.854 | 3.781 |
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