Dc Tig Welding; Welding; Earthing; Storing - Kemppi MINARC 150 AU Operation Instructions Manual

3.3.2.

DC TIG welding

Select welding parameters according to fi ller 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 fi x 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 fi 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. 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 fl ow,
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 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 having
fi 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.
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.
©
COPYRIGHT KEMPPI OY
.
Minarc 150AU / 0411 – 7