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 Frequency of Discharge?
Frequency of Discharge calculator uses Frequency of Spark Time = 0.5/Sparking Time to calculate the Frequency of Spark Time, The Frequency of discharge formula is defined as the number of sparks produced per second while discharging of the relaxation circuit. It is the inverse of the time period for a given oscillation. Frequency of Spark Time is denoted by ft symbol.
How to calculate Frequency of Discharge using this online calculator? To use this online calculator for Frequency of Discharge, enter Sparking Time (ts) and hit the calculate button. Here is how the Frequency of Discharge calculation can be explained with given input values -> 0.029815 = 0.5/16.77.