Roundness Errors Prevention of the Machined Surface in WEDM

Progressive electrical discharge machining technology is characterized by a high degree of quality of the machined surface. The high achieved quality of the machined surface not only in terms of roughness parameters but also in terms of geometric shape is practically a matter of course with this machining technology. Nevertheless, in certain specific cases, geometric deviations of the shape occur, even when the most modern and highly sophisticated electrical discharge equipment are used. One of the frequently occurring geometric inaccuracies of the shape when applying progressive electrical discharge machining technology with a wire tool electrode is the deviation of circularity. Therefore, the aim of the conducted experimental research was to identify these shortcomings in the first place and also to describe in which specific cases these deviations occur. Subsequently, based on the obtained results of experimental measurements, propose appropriate measures for their elimination or at least their minimization.