7. Connecting shield gas bottle
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Place the shield gas bottle close to the welder so the gas hose is loose.
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Attach a gas regulator type depending on shield gas type.
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Connect the regulator outlet with gas supply connector at the back of the welder using a
gas hose.
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Open gas bottle valve and a gas regulator valve. After the welding is finished close the
bottle valve to terminate gas flow.
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Please notice to avoid using the welder in windy conditions as it may cause the gas shield
to dissipate.
8. Setting welding parameters for MIG/MAG
Basic parameters for mig welding are welding voltage and wire feed speed. Increasing welding
voltage results in deeper penetration and longer arc. However increasing wire feed speed results in
more wire being provided. If you notice that too much wire is being feeded and it pushes the torch
backwards it may be caused by to low welding voltage. Too low welding voltage or slower wire feed
can also result in more spatter and large droplets developing at the tip. You can reduce that by
increasing the voltage value or wire feed speed.
9. MIG/MAG welding tips
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Welding horizontal butt joints of thin materials should be carried out using push technique.
However for thick material it should be a pull technique.
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For vertical butt joints of thin elements place the joint from up to down.
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Horizontal corner joints should be carried out using push technique compensating by
placing the torch at an appropriate angle towards welding material.
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In case of filling wider joints carry the oscillating move of the welding tip.
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During the welding torch tip should be placed at an appropriate angle. If the angle is not
right it may cause air to be sucked into welding puddle resulting in joint imprefections. The
proper angle is lower or equal to 10 degrees for vertical position.
Too long or too short arc can result in unstable arc and joint
imprefections.
L1, L2
– arc length
The penetration depth can differ according to welding
technique and torch position
H1, H2
– penetration depth
