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 Charging Circuit of EDM?
Capacitance of Charging Circuit of EDM calculator uses Capacitance of Charging Voltage = -(Time Elapsed for Charging Voltage/(Resistance of the Charging Voltage*ln(1-(Voltage at any Time for Charging Voltage/Voltage of Power Supply Charging Voltage)))) to calculate the Capacitance of Charging Voltage, The Capacitance of charging circuit of EDM formula is defined as the capacitance of the capacitor connected to the charging circuit of the EDM. Capacitance of Charging Voltage is denoted by Cv symbol.
How to calculate Capacitance of Charging Circuit of EDM using this online calculator? To use this online calculator for Capacitance of Charging Circuit of EDM, enter Time Elapsed for Charging Voltage (te), Resistance of the Charging Voltage (Rcv), Voltage at any Time for Charging Voltage (Vcv) & Voltage of Power Supply Charging Voltage (Vscv) and hit the calculate button. Here is how the Capacitance of Charging Circuit of EDM calculation can be explained with given input values -> 5.248128 = -(11.43/(1.8*ln(1-(7.2/10.01)))).