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 Maximum Spark Current to be Maintained Indefinitely?
Maximum Spark Current to be Maintained Indefinitely calculator uses Maximum Current in Sparking Circuit = (Voltage of Power Supply-Discharge Voltage of Arc)/Resistance of Criterion Arc to calculate the Maximum Current in Sparking Circuit, Maximum spark current to be maintained indefinitely is defined as the maximum current which can be sustained indefinitely using the criterion for arcing in EDM. Maximum Current in Sparking Circuit is denoted by idmax symbol.
How to calculate Maximum Spark Current to be Maintained Indefinitely using this online calculator? To use this online calculator for Maximum Spark Current to be Maintained Indefinitely, enter Voltage of Power Supply (V0), Discharge Voltage of Arc (Varc) & Resistance of Criterion Arc (Rarc) and hit the calculate button. Here is how the Maximum Spark Current to be Maintained Indefinitely calculation can be explained with given input values -> 31.8931 = (10-1.068)/0.29.