Optimising The Ignition Characteristics For Pure Tungsten Electrodes; Tungsten Balling Function - EWM Tetrix 451 AC/DC AW FW Operating Instructions Manual

Design and function
TIG Synergic operating principle
5.7.5

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.
5.7.6

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.
EXIT
56
Figure 5-27
mm
inch
Balling
Figure 5-28
EXIT
3s
099-000115-EW501
20.11.2017