Electro Arc AC and DC Metal Disintegrators

Both types run on power from your electric utility, from
110 to 600 volts AC. Both use the frequency of the incoming
power to vibrate the electrode to make and break the arc; an
AC machine at 50 or 60 times per second; a DC machine at
120 times per second. The difference is in how AC and DC
machines provide “burning” power to the arc.
An AC machine’s power supply steps the voltage down to
form the arc. The Heat Selector adjusts the voltage to the
electrode.
The power supply in a DC machine steps down and rectifies
the incoming power to provide full-wave DC power to the arc.
The electrode is connected to the negative side of the power

supply; the work piece to the positive side. The Cutting Power
selector adjusts the voltage to the electrode.
DC power can provide higher momentary arc current levels that can sustain a larger arc, but also causes a different
quality of material erosion. The result is the capability to use
larger electrodes like square or hex-shaped carbon to burn
faster or make larger holes.
But power comes at a price. The components in a DC
machine cost more than those of a similar-size AC machine,
and weigh more.
Which machine is best for you depends on what you need
to accomplish on a daily basis.