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 Charging Time from Minimum Resistance?
Charging Time from Minimum Resistance calculator uses Charging Time = Minimum Resistance for Charging Time*Capacitance of Charging Time to calculate the Charging Time, Charging time from minimum resistance is defined as the time required to charge a particular sparking relaxation circuit of EDM. Charging Time is denoted by tc symbol.
How to calculate Charging Time from Minimum Resistance using this online calculator? To use this online calculator for Charging Time from Minimum Resistance, enter Minimum Resistance for Charging Time (Rct) & Capacitance of Charging Time (Cct) and hit the calculate button. Here is how the Charging Time from Minimum Resistance calculation can be explained with given input values -> 0.0014 = 270*0.07.