Fine-tuning EDM for different materials and finishes
| Parameter | Die Sinking (Rough) | Die Sinking (Finish) | Wire EDM |
|---|---|---|---|
| Current (A) | 10-60 | 0.5-5 | 1-4 |
| On Time (us) | 100-500 | 5-50 | 0.1-5 |
| Off Time (us) | 30-100 | 10-30 | 5-20 |
| Surface Finish | Ra 6-15 | Ra 0.2-0.8 | Ra 0.1-0.4 |
Graphite: rough machining, lower wear. Copper: fine finish, better surface. Copper-Tungsten: small details, high wear resistance.