Table 1

Process parameters with levels.

Parameters Symbols Levels unit

    I II III  
Peak current Ip 1 2 3 Amp
Gap voltage Vg 30 50 70 V
Pulse on time Ton 50 100 150 μS
Duty cycle Dc 5 7 9 %
Polarity P −/+  
Fixed parameters
Flushing pressure Fp 0.5 Kgf/cm2
Working time WT 10 min
Servo sensitivity SEN 9  
Arc sensitivity ASEN 9  
Dimension of electrodes
Work piece 10 mm × 5 mm
Tool electrode 2 mm × 10 mm

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