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 Resistance of circuit?
Resistance of circuit calculator uses Resistance of the Charging Circuit = -(Proportionality Constant of MRR*Voltage at any Time t^2)/(2*Material Removal Rate*ln(1-(Voltage at any Time t/Voltage of Power Supply))) to calculate the Resistance of the Charging Circuit, The Resistance of circuit formula is defined as the resistance offered by the circuit. It is much useful in determining the current and potential in the circuit. Resistance of the Charging Circuit is denoted by Rc symbol.
How to calculate Resistance of circuit using this online calculator? To use this online calculator for Resistance of circuit, enter Proportionality Constant of MRR (Kmrr), Voltage at any Time t (Vc), Material Removal Rate (MRR) & Voltage of Power Supply (V0) and hit the calculate button. Here is how the Resistance of circuit calculation can be explained with given input values -> 46471.69 = -(1.5*2^2)/(2*74.69*ln(1-(2/10))).