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Table 2 PMEDG process factors and ranges

From: Processing of Al2O3–SiCw–TiC ceramic composite by powder mixed electric discharge grinding

Process factors Symbol Levels
Lowest Low Center High Highest
−2 −1 0 +1 +2
Powder concentration (g/L) Pc 8 16 24 32 40
Duty-ratio (%) Dc 0.24 0.40 0.56 0.72 0.88
Pulse on time (μs) Ton 100 200 300 400 500
Table speed (m/min) Vt 0.030 0.045 0.060 0.075 0.090
Wheel speed (m/min) Vw 0.79 1.57 2.36 3.14 3.93