is ideal for welding ferrous metals including carbon and stainless steels, copper, titanium, zirconium and most nickel alloys.
is ideal for welding non-ferrous metals including magnesium and most aluminium alloys.
is a high frequency spark (electronic impulse) created to initiate current flow between the electrode and the work piece. In DC mode the HF spark is removed once the welding current is established, but in AC mode the HF remains in place to stabilise the arc.
is a facility which allows for starting the arc without high frequency. This is particularly useful in areas where HF could interfere with computer and telecommunications equipment.
on a variable timer, allows for purging the torch and weld start area prior to establishing te arc. This ensures the weld starts in an inert atmosphere.
allows you to commence welding with a gradual (timed) increase in the welding current up to the selected main current level.
is a gradual (timed) reduction in the welding current down to a final, normally pre-set, level, thus eliminating crater cracks or high temperature gas holes on completion of the weld.
on a variable timer, ensures gas coverage to protect the completed weld area from atmospheric contamination.
(sometime called 4T) saves keeping the trigger pressed during the welding cycle, especially useful during long weld runs. An initial press and release of the trigger starts the weld and a subsequent press and release stops the weld.
(only present on AC/DC TIGs) gives you the ability to offset the AC, in order to control weld penetration, width and cleanliness.
normally achieved with a foot pedal, gives variable control of the welding current (and therefore arc). The pedal can also be used as the trigger switch.