Design and function
TIG welding
099-000118-EW501
24.11.2017
51
5.9.9
Optimising the ignition characteristics for pure tungsten electrodes
The best ignition and stabilisation of the arc (DC, AC) and optimum spherical cup formation in the
tungsten electrode depend on the electrode diameter being used.
The set value should correspond to the diameter of the tungsten electrode. The value can of course be
adjusted in line with different requirements.
EXIT
3s
Figure 5-28
5.9.10 Tungsten balling function
Tungsten balling ensures optimum ignition and welding results for AC welding.
Optimum tungsten balling requires a sharpened electrode (about 15
–25°) and the set electrode diameter
on the machine control. The set electrode diameter affects the current for tungsten balling and,
consequently, also the ball size.
Tungsten balling should be performed on a test component as surplus tungsten may be melted and this
may lead to impurities on the weld seam.
mm
inch
Ball ing
EXIT
Figure 5-29
