Table 1.

Input factors for the experiment.

Factors	Parameters	Values
Constant factors:	Voltage (V)	120
	Machining time (s)	600
	Material and diameter of electrode tool (μm)	Tungsten, ϕ = 381
	Dielectric liquid	Exxol80 (hydrocarbon)
	Electrode tool rotation (rpm)*	250
	Pulse duty cycle D (%) $D=\frac{t_{on}}{t_{on}+t_{off}}·100\%$	50
	Threshold current It (A)	0.3
Disrupting factors:	Uneven dielectric liquid flow
Variable process parameters:	Pulse-on time ton (μs)	1; 10
	Pulse-off time toff (μs)	1; 10
	Pulse period (μs)	2; 20
	Pulse frequency (kHz)	500; 50
	Working current Iw (A)	0.9, 1.35, 1.8