How the spark is produced in Electric Discharge Machining ?
A typical circuit used for supplying the power to an EDM machine is named as the relaxation circuit. The circuit consists of a DC power source, which charges the capacitor ‘C’ across a resistance ‘Rc’. Initially when the capacitor is in the uncharged condition, when the power supply is on with a voltage of Vo, a heavy current, ic, will flow in the circuit as shown to charge the capacitor. The relaxation circuit as explained above was used in the early EDM machines. They are limited to the low material removal rates for fine finish, which limits its application. This can be explained from the fact that the time spent on charging the capacitor is quite large during which time, no machining can actually take place. Thus the material removal rates are low.
How to Calculate Frequency of Discharge Oscillation?
Frequency of Discharge Oscillation calculator uses Frequency of Discharge = 1/(2*pi)*sqrt(1/(Inductance of Discharge Frequency*Capacitance of Discharge Frequency)) to calculate the Frequency of Discharge, Frequency of discharge oscillation as the number of sparks produced per second while discharging of the relaxation circuit. It is the inverse of the time period for a given oscillation. Frequency of Discharge is denoted by fd symbol.
How to calculate Frequency of Discharge Oscillation using this online calculator? To use this online calculator for Frequency of Discharge Oscillation, enter Inductance of Discharge Frequency (Lf) & Capacitance of Discharge Frequency (Cdf) and hit the calculate button. Here is how the Frequency of Discharge Oscillation calculation can be explained with given input values -> 0.029757 = 1/(2*pi)*sqrt(1/(5.71*5.02)).