I am using RC pulse generator.
Total spark energy calculated using formula 1/2*C*V2. This equation represent the total amount of energy utilized while removing material from the work pieces. Higher or lower value of capacitance indicates higher or lower amount of discharge energy per spark during the process. My question is that, what (gap voltage)2 does or influences or contributes during the machining process while using micro EDM.
In my opinion, the applied voltage or gap voltage determines the energy of the spark in the form of kinetic energy during the machining process in order to help for removing higher material.
In a relaxation generator, the capacitor is not constantly charged to the maximum voltage. The gap conditions lead to different ignition voltages occurring at each pulse. Considering, for example, 100 pulses, a different distribution of these gap voltages is obtained, depending on the control, which is of equal importance in that each pulse provides a different pulse energy.
Agree with Dr. Schulze and Cyril.
In micro-EDM there is a need for minimization of discharge energy per pulse. In RC-type the discharge energy can be minimized simply by using very low value of capacitance. Therefore, as the energy per pulse is smaller in RC circuit as compared to Transistor-type.
Purpose of RC circuit is to control amount of discharge energy to obtain better micro-features.
In RC-type micro EDM, total spark energy calculated using formula 1/2*C*V2. That means contribution of voltage is always more than capacitance. But experimentation shows that contribution of capacitance is very high compared to contribution of voltage. The result is contradict with the formula.
I think the write error is unintentional, because above they call the same equation correctly.
However, your final conclusions are not correct. The pulse energy depends on the voltage square, that is, when the voltage distribution is between 0.9 and 0.7 Umax, the pulse energy changes from 81% of the maximum energy to 49%.
The changes in capacities with modified technology parameters can be 10 to 100 times. Now the micro-EDM still has the problem that for "small" pulse energies the switched capacitances can lie in the range of the parasitic capacitances of the supply line. This means that they must always calculate their parasitic capacitance in micro-EDM and incorporate them into their energy calculations. In other words, modified workpiece sizes (other feeders) lead to different arrangements for changing pulse energies, which they do not expect at the first moment.
I think that the gap dimension is more effect than gap voltage in EDM machining process.
https://www.researchgate.net/post/What_is_the_contribution_of_gap_voltage_during_Micro_Electrical_Discharge_Machining_process
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