Gradient Boosted Trees Predictive Models for Surface Roughness in High-Speed Milling in the Steel and Aluminum Metalworking Industry

Table 8

List of hyperparameters used for both machines with each model and general results.

Experiment	Number of Trees (per class)	Maximal Depth	Minimum Rows	Accuracy on Grid Search Cross-Validation	Accuracy on Test Set
Slots (M1)	40	4	5	82.51% +- 1.76% (82.50% micro average)	78.00%
Slots (M2)	60	6	4	89.67% +- 4.64% (89.62% micro average)	61.54%
Geometries (M1)	100	8	10	87.51% +- 2.93% (87.50% micro average)	88.51%
Geometries (M2)	40	4	8	89.57% +- 0.74% (89.58% micro average)	85.71%