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Start current
- current appearing in the circuit after pressing the button in the grip handle. The higher
the initial current, the easier it is to ignite the arc. However, when welding thin sheets, too high an
initial current can lead to the burning of the sheet. In some welding modes, the current does not
increase in order to heat the welded element.
End current
- current used in some welding modes, when the arc is not extinguished immediately
after the welding current sinking. It allows filling the crater and the end of the weld.
Base current
- current responsible for maintaining the welding process, lower value of the current
pulse. It makes it easier to control the amount of heat entering the material. The adjustment of the
base current is only possible when the switch (19) is in the (central) position.
Pulse frequency
- frequency with which the value of the current pulse between the welding current
and the base current changes. Pulse frequency adjustment is possible with the knob (16) in two ranges
- low 0.5 - 10 Hz with the switch (19) in the (upper) position and high 10 - 200 Hz with the switch
(19) in the (central) position. Setting the switch (19) to (lower) will result in welding without a pulse.
Pulse width
- duration of the pulse, allows you to adjust the depth of the penetration. The increase in
width increases the penetration depth, the reduction reduces the amount of heat entering the material,
reducing the risk of burning thinner sheets or smaller elements.
Lower pulse width values should be used for higher currents. For example, a width of 30% should be
used for currents greater than 200A. The larger pulse width should be used for small currents, for
example, a width greater than 50% should be used for currents below 100A.
Gas pre-flow time
- time from pressing a button in the grip handle until the arc is ignited. It should
normally be longer than 0.5 s to provide shielding gas to the nozzle tip outlet to cover the welding
start point and the tungsten electrode. In the case of a longer gas line from the cylinder, the pre-run
time should be longer.
Time of gas post-flow
- time from extinction of the arc to closing the gas valve to shield the
solidifying weld pool from air and to cool the tungsten electrode. Too short time of outflow may
result in oxidation of the weld. When welding in AC TIG mode (AC), this time should be longer
Current rise time
- time of welding current rise from the start current to the set welding current
value.
Time of current descent
- time of welding current dropping from the value set to zero or the value of
the crater current.
AC current frequency
- a function useful when welding aluminum. The higher the frequency, the
better the weld quality, the better the arc focus
AC Current Balance
- The ratio of the duration of the positive to negative phase. The reduction of
the balance results in the introduction of more heat into the material, resulting in a narrower weld and
deeper penetration, and at the same time reduces the heat load of the tungsten electrode. Increasing
the balance results in the introduction of less heat into the material, resulting in better cleaning, a
broad joint and a shallower penetration, however, it significantly weighs the tungsten electrode.
