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EN
3.4 WELDING SELECTIONS
NOTE! Welding fumes may be dangerous to 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 x earth cable clamp directly on the welding 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 3.4. Welding selections.
NOTE! It is recommended that you try welding and rate of welding current rst
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. Length of arc is regulated by
holding electrode tip at a suitable distance from welding 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 current value.
Shielding gas is used in DC TIG welding. Your dealer will give you advice on
choosing gas and equipment. Open the gas valve on the TTM 15V TIG torch.
When gas starts to ow, arc is lit by lightly scratching 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 current rate. Stop welding by
lifting the torch o the welding piece and by closing the gas valve on the
torch.
NOTE! Always x 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 nished 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.
10
Minarc 150, 151 / © Kemppi Oy / 1117
12


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