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 Capacitance of Circuit using Resistance Minimum?
Capacitance of Circuit using Resistance Minimum calculator uses Capacitance of Minimum Resistance = Inductance/((Minimum Resistance/30)^2) to calculate the Capacitance of Minimum Resistance, The capacitance of circuit using resistance minimum is defined as the equivalent capacitance of all the capacitors connected in the relaxation circuit of EDM to produce a spark. Capacitance of Minimum Resistance is denoted by Cr symbol.
How to calculate Capacitance of Circuit using Resistance Minimum using this online calculator? To use this online calculator for Capacitance of Circuit using Resistance Minimum, enter Inductance (L) & Minimum Resistance (Rmin) and hit the calculate button. Here is how the Capacitance of Circuit using Resistance Minimum calculation can be explained with given input values -> 3.521673 = 5.8/((38.6/30)^2).