Function

The process is based on the electro-erosion principle. Material is removed from the workpiece by a series of rapidly recurring current discharges between two electrodes, separated by a dielectric liquid and subject to an electric voltage. One of the electrodes is called the tool-electrode, or simply the “tool” or “electrode,” while the other is called the workpiece-electrode, or “workpiece.” The process depends upon the tool and workpiece not making actual contact.

In order to machine high quality micro holes the Posalux EDM machines have a tilting head with deformation by pressure that allows to control the diameter of the hole, resulting in a run-out of the tool electrode. The electrode turns with a decentering, giving two different gaps, one where sparks erode the material  and  another,  bigger one,  allowing  a  better flushing of eroded materials. In combination with CNC driven axis and  a high-speed interface to communicate with the micro EDM generator, perfect micro holes are the result.