Table 3 Selection of process parameters.

From: An experimental investigation on copper square electrode wear in electric discharge machining of Hastelloy B2

Parameters

Unit/Symbol

Levels

Machine limits/From the literature papers/Problems observed

  

1

2

3

4

 

Current

A/ I

3

6

9

12

Circular hole formed by lowering below 3 A current20

Pulse duration

µs / Ton

75

150

225

300

Based on machine limit

Duty cycle

% / DC

2

4

6

8

Kuppan et al.22

Servo Voltage

V/ SV

60

70

80

90

Based on machine limit

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