OCTOBER 19-20, 2012 - YMCA University of Science & Technology

Proceedings of the National Conference on
Trends and Advances in Mechanical Engineering,
YMCA University of Science & Technology, Faridabad, Haryana, Oct 19-20, 2012
Figure No. 3
Figure No. 4
Maximum cutting is to be found at Toff 45µs due to complete flushing of debris from the machining zones. After
that further increase of pulse off time dielectric fluid produce the cooling effect on wire electrode and work
material and hence decrease the cutting speed. At high pulse of duration (Ton 120µs) the cutting speed increase
very fast as compared to low pulse of duration (Ton 108µs)
3.4. Effect of servo voltage
The effect of servo voltage on cutting speed is shown in figure no. 5 with two different pulse durations (Ton 108
and 120) along with two different values of wire feed 5 meters per min and 6 meters per min keeping other
variables fixed such as pulse off time (Toff) 35µs, servo voltage 20V, discharge current 120 A and servo feed
2080 and Wire Tension 10 N.
Figure No. 5
The cutting speed decrease with increase in servo voltage from 20V to 60V for wire feed 5 m/ min and from 30V
to 50 V for wire feed 6 m/min. Large servo voltage means large ionization of the dielectric fluid between
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