Using direct ultrasonically aided micro-EDM, the process speed can be raised by up to 40%.
The discharge gap state benefits additionally from the cutting off of long arc discharges and geometric deviations are further reduced.
The direct ultrasonic vibration of the tool or workpiece enables the machining of complex
structures with very high aspect ratios, as well as 163 Enhancing Micro-EDM using Ultrasonic Vibration and Approaches for Machining of Nonconducting Ceramics Strojniški vestnik - Journal of Mechanical Engineering 59(2013)3, 156-164 enabling bores of less than 90 um in diameter with aspect ratios >40 for metallic materials.