© KEMPPI OY MINARC 120, 150 / 0546 – 7
3.3.2. DC TIG welding
Select welding parameters according to filler manufacturer’s recommendations.
1. Connect TIG torch to - pole and earth cable to + pole
2. Select TIG welding with switch .
3. Select suitable welding current by adjusting the potentiometer.
3.4. WELDING
Welding fumes may be dangerous for your health, see that there is ample ventilation
during welding!
Never look at the arc without face shield made for arc welding! Protect yourself and
your surroundings from the arc and hot spatter!
3.4.1. Earthing
If possible, always fix earth cable clamp directly on the work piece.
1. Clean connection surface of earth clamp from paint and rust.
2. Connect the clamp carefully so that contact surface is as large as possible.
3. Finally check that the clamp sits tight.
3.4.2. Welding
See also 3.1. Welding processes and 3.3. Welding selections. Note! It is recommended that you try
welding and rate of welding current first on something else than the actual work piece.
You can start welding after having made the necessary selections. Arc is lit by scratching the welding
piece with electrode. Arc length is regulated by holding electrode tip at a suitable distance from
work piece. Suitable arc length is usually about half the diameter of the electrode core wire. When
arc is lit, move the electrode slowly forwards tilting it to appr. 10-15° pulling angle. If necessary,
adjust the current value.
Shielding gas is used in DC TIG welding. Your dealer will give you advice on choosing the gas and
equipment. Open the gas valve on the TTM 15V TIG torch. When gas starts to flow, arc is lit by
lightly scratching the work piece with the tip of the tungsten electrode. When arc is lit, its length
is regulated by holding the tip of the tungsten electrode at a suitable distance from the work piece.
Move the torch forwards from the starting point, usually in appr. 10-15° pushing angle forwards.
If necessary, regulate the current rate. Stop welding by lifting the torch off the work piece and by
closing the gas valve on the torch.
Note! Always fix the gas cylinder so that it stays steadily in upright position either in specially made
wall rack or cylinder trolley. Always close the cylinder valve after having finished welding.
3.5. STORING
Store the unit in a clean and dry place. Shield it from rain, and in temperatures exceeding +25 °C
from direct exposure to sun.
4. MAINTENANCE
Be careful when handling electric cables!
In maintenance of the unit, take into consideration the rate of use and the environment it is used
in. When the unit is used properly and serviced regularly, you will avoid unnecessary disturbances
in use and production.
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