Kemppi Minarc 110 - Manual (Page 7)

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COPYRIGHT KEMPPI OY
Minarc/0244 – 7
3.3.2. DC TIG welding
Select welding parameters based on fi ller manufacturer’s recommendations.
1. Connect TIG torch to - pole and earth cable to + pole
2. Select TIG welding with the switch .
3. Select suitable welding current on adjusting potentiometer scales.
3.4. WELDING SELECTIONS
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. Earth
If possible, always fi 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 advisable to
test welding and rate of welding current fi rst on something else than the actual welding
piece.
You can start welding after having made necessary selections. Arc is lit by scratching
the welding piece with electrode. Length of arc is regulated by holding electrode tip
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
fl ow, arc is lit by lightly scratching welding 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 welding 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 off the welding piece and by closing the gas
valve on the torch.
Note! Always fi 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
fi nishing welding.
3.5. STORING
Store the unit in a clean and dry place. Shield it from rain, and in temperatures
exceeding 25 °C shield it from direct exposure to sun.
4. MAINTENANCE
Be careful when handling electrical cables!
In maintaining the unit take into consideration rate of use and the environment it is used
in. When the unit is used properly and regularly serviced, you will avoid unnecessary
disturbances in use and production.