| Average current |
The time-average value of a pulse current, or the value read on the ammeter. |
| EDM |
A metal removal process using a series of electric sparks to erode material
from a workpiece under carefully controlled conditions. |
| Electrode |
The tool in the EDM process. It must be made from an electrically conductive
material. Its form, or shape, is a mirror image of the finished form or shape desired
in the workpiece, with its dimensions adjusted to take into account the amount of
overcut that occurs. |
| Generator |
An old term for EDM power supply. |
| Off-time |
The width of low level pulse, measured in microseconds. |
| On-time |
The width of high level pulse, measured in microseconds. |
| Output |
The voltage and current of an EDM power supply. |
| Peak current |
The maximum current available from each pulse from the power supply/generator. |
| Power supply |
The part of the EDM system that supplies the voltage and current that causes
the sparks or discharges between the electrode and workpiece. |
| Surface finish |
The relative roughness or smoothness of the machined surface. Usually measured
in µin Ra in the U.S. |
| Workpiece |
Any part on which EDM is being used to cut holes or cavities. |
