Stick
With Stick welding both the feed rod and
the welding gas are combined so no shielding
gas tanks are needed. The new feed rod with
the solidified gas is fed as the electrode
instead of tungsten which is used in Tig
welding.
In order to feed the rod the welder has to
manually push the feed rod through the
welding gun with the same hand that is
holding the welding gun.
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http://www.weldguru.com/arc-welding.html
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Tig
With Tig welding The feed rod is fed with
one hand while the welding gun is held with
the other. The electrode for this Tig welder
is a tungsten rod. An inert gas usually
argon is spewed around the tungsten to
prevent oxidation of the weld.
Tig welding is the least forgiving to
impurities in the metal out of the three
shown here.
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http://4mechtech.blogspot.com/2014/05/mig-welding.html
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Mig
With Mig welding the feed rod is
automatically fed through the gun. The feed
rod also acts as the electrode. Unlike Stick
welding Mig requires an inert gas to
surround the weld.
This is the most commonly used type of
welding as it is the most forgiving to
impurities in the metal and it is self
contained (doesn't need two hands).
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http://www.weldguru.com/Mig.html
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