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4 OPERATION
4.3
Grinding
NOTE!
Tungsten electrodes must be grounded lengthways. If they are incorrectly grounded, the arc
may be unstable. When the welding current is increased, the angle must also be increased.
When welding with alternating current (AC), the electrode end must be gently rounded. Grinding the
electrode is then unnecessary. Light grading of the edge is sufficient. The electrode forms itself if it is
carefully overloaded. If the tip becomes ball-shaped while welding using alternating current, this is a
sign that the current is too high for the diameter of the electrode being used.
Grind tungsten electrodes according to the following table:
Welding current
20 A
20–100 A
100–200 A
over 200 A
4.4
Bending of the flexible torch
The life of the flexible torch is limited. The maximum bending angle should be 45 degrees.
The life of the torch head can be prolonged by proper technique.
Always make sure that the torch head is supported by the thumb when you bend. This prevents
damage at sharp bending.
4.5
Valve torches
CAUTION!
Do not operate TIG torches with an integrated valve in the torch neck on welding systems
equipped with an ignition and stabilisation device.
M003
Electrode angle
30°
30°–90°
90°–120°
120°
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© ESAB AB 2023
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