Kemppi MasterTig 235ACDC Operating Manual page 76

Pulse TIG
TIG welding process, where the welding current changes between two current levels: base current and pulse
current. Parameters can be set either manually or automatically. Used for optimizing the arc characteristics for
desired welding applications.
S
Search arc
Welding function that allows using a brief low current period at the start of the weld. This enables precise start
of welding. The parameters are preset by the user.
Slight upslope
This is a function that automatically creates a slight upslope to prevent electrode wearing caused by sudden
current rises with high welding currents. This function has an effect only when the welding current is 100 A or
more.
Soft start
Welding function that uses lower welding current at the start of the weld. After the Soft start period the cur-
rent rises to normal welding current level. The values for Soft start current level and its duration are preset
manually. Soft start is used to soften the start period of welding especially with steels.
Spot welding
TIG welding function, which automatically produces a weld of predefined duration. Parameters are preset by
the user. This function is used for attaching two pieces of materials with tack welds, for example joining thin
sheets with low heat input.
Startup level
The point of welding current where the upslope begins.
T
Tail arc
Welding function that allows using a brief low current period at the end of the weld. This reduces welding
defects caused by end cratering. The parameters are preset by the user. The value zero means the function is
off.
TIG
Manual welding process that typically uses a non-consumable tungsten electrode, a separate filler material,
and an inert shielding gas to protect the weld area from oxidation and contamination during the welding pro-
cess. The use of a filler material is not always mandatory in TIG welding.
TIG antifreeze
A function which automatically decreases the welding current significantly when electrode is touching the
workpiece. Can be used for example to avoid unwanted dilution from electrode to welded metal.
Trigger logic
Welding torches have two alternative operation modes: 2T and 4T. They differ in the way how the trigger oper-
ates. In 2T mode you hold the trigger down while welding, whereas in 4T mode you press and release the trig-
ger to start or to stop welding and to use special trigger functions, such as Minilog.
Trigger logic 2T
Trigger operation mode of a welding torch. When you press the trigger down in 2T mode, the shielding gas
starts to flow and the arc ignites. Hold down the trigger while welding and release it when you want to stop
© Kemppi
MasterTig 235ACDC, 325DC, 335ACDC, 425DC
76
Operating manual - EN
1920900 / 2052