OTC DAIHEN EUROPE DTX 1800 TIG, Руководство пользователя, Страница: 52 / 73

Electrode welding (MMA)
GB
49
DTX 1800/1801 TIG
Preparation of the toe:
The preparation of the toe always depends on the thickness of the workpiece, its
location, position and on the type of connection. We recommend always welding with
clean workpieces so that oxides rust and other impurities don’t influence the quality of
the welding results. The preparation of the toe can be either in the form of "U", for
seams without correction or in the form of "Y", for welds with correction.
Choice of the electrode:
The choice of the electrode depends on the material thickness of the seam type and
its location. Because of the very fluid melt that runs down during the welding process
in tight spots you should use electrodes with a small diameter. For electrodes with
larger diameters a higher welding current is necessary.
Setting the welding current:
The stability of the welding current enables the welding at low current and under
difficult working conditions. The following table shows the recommended values of the
minimum and maximum welding current, which are used in welding of carbon-
containing, non-alloyed steels.