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 |