Welding Processes And Features - Kemppi MasterTig 335ACDC Operating Manual

6.6 Welding processes and features

The MasterTIG 235, 325 and 335 welding equipment supports a variety of welding processes and features depend-
ing on the control panel used. This section summarizes some of them.
[AC Balance]
Function to adjust the positive and negative current cycles in AC TIG welding. Low percentage means that, on average, the welding
current is more on the negative side, and high percentage that, on average, the welding current is more on the positive side.
[AC Frequency]
Function to change the frequency of the alternating current in AC TIG welding. This setting adjusts the number of cycles per second.
Used for changing the frequency of the welding current to best match the welder's preference and application.
[AC TIG]
Alternating current TIG welding process, where the polarity of the electrode alternates rapidly between positive and negative. Used
especially in aluminum welding.
[AC Waveform]
Function to change the wave form of the alternating current in AC TIG welding. Three options are available: sine, square and
Optima. The wave form affects the shape of weld bead, penetration of the weld and the noise of the welding process. Select the one
that suits the application.
[Auto pulse]
TIG welding process, where the welding current alternates between two current levels: base current and pulse current. Only welding
current needs to be adjusted and pulse parameters are preset automatically. Used for optimizing the arc characteristics for desired
welding applications.
[DC TIG]
Direct current TIG welding process, where the polarity of the electrode is either positive or negative throughout the welding process.
Negative polarity (DC-) allows high penetration, whereas positive polarity (DC+) is used only in special applications.
[Double pulse]
Double pulse TIG welding can be used for example to increase travel speed or to produce welds with high visual requirements. The
welding current is pulsed in two different frequencies: slow and fast. The fast frequency makes the arc more focused, and the slow fre-
quency produces a nice fish-scale appearance to welds.
[Downslope]
Welding function that determines the time, during which the welding current gradually decreases to the end current level. The value
for the Downslope time is preset by the user. The value zero means the function is off.
[HF ignition]
Ignition mode in TIG welding. In HF ignition, a press on the torch trigger produces a high voltage pulse that creates a spark to ignite
the arc. The HF ignition mode must be activated in the control panel.
[Hot start]
Welding function that uses higher welding current at the start of the weld. After the Hot start period the current drops to normal
welding current level. The values for Hot start current level and its duration are preset manually. This facilitates the start of the weld
especially with aluminum materials.
© Kemppi
MasterTig 235ACDC, 325DC, 335ACDC
66/73
Operating manual - EN
1920900 / 1921