OBRABOTKAMETALLOV Vol. 23 No. 3 2021 MATERIAL SCIENCE EQUIPMENT. INSTRUMENTS 6 4 technology, a full factor experiment (FFE) of type 23 with the center of the plan was carried out. The factor values were coded into a matrix using transformation coordinates. The planning matrix of the experiment is shown in Table 3. The output parameters are the TE roughness parameter Ra, μm and TE wear γ, g. The detailed methodology of FFE is presented in papers 23–24. According to this technique, 9 experiments were carried out and the results were obtained on the dependence of TE roughness Ra and electrode wear depending on the modes of EDM using TE manufactured by SLS technology from MS1 maraging steel (Table 4). а b Fig. 3. Facilities for conducting the experiment and evaluating the results: а – ReaLizer SLM 50; b – NIM900 microscope; c – Electronica Smart CNC copy-piercing EDM machine; d – Mahr Perthometer S2 profilometer c d Ta b l e 3 Coded planning matrix Exp. No. X0 X1 X2 X3 X1X2 X1X3 X2X3 X1X2X3 1 1 -1 -1 -1 1 1 1 -1 2 1 1 -1 -1 -1 -1 1 1 3 1 -1 1 -1 -1 1 -1 1 4 1 1 1 -1 1 -1 -1 -1 5 1 -1 -1 1 1 -1 -1 1 6 1 1 -1 1 -1 1 -1 -1 7 1 -1 1 1 -1 -1 1 -1 8 1 1 1 1 1 1 1 1 9 1 0 0 0 0 0 0 0
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