Kemppi Minarc Mig Evo 200 Operating Manual Download Page 6

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can be 0.8 mm, 0.9 mm or 1.0 mm in diameter, the aluminium wire 1.0 mm and CuSi wire 0.8,

0.9 and 1.0 mm.

1.2.2 About welding

In addition to the welding machine, welding outcome is influenced by the work piece to be

welded, welding technique and the welding environment. Therefore, recommendations in this

manual must be followed.
During welding, an electric welding circuit is created between the positive and negative

poles of the machine. On delivery, the welding gun is connected to the positive pole of the

machine terminals. The terminals are located inside the case door and should not be changed

unless you intend to run a filler wire that is directed to be used in reverse polarity, electrode

negative. When a filler wire is loaded to the machine, the wire feed mechanism drives the filler

wire through the contact tip mounted in the welding gun, and thus transfers electrical power

from the contact tip to the filler wire. The earth return clamp and cable (already connected to

the machine on delivery to the negative terminal) connects to the workpiece to be welded.

When the filler wire touches the work piece a short circuit occurs, forming the needed closed

electrical circuit, an arc is formed and welding commences. Unrestricted current flow is

possible only when the earth return clamp is properly attached to the workpiece and the

fixing point of the clamp to the workpiece is clean, and free from paint and rust.
Shielding gas must be used during welding in order to prevent air from mixing with the weld

pool. Pure carbon dioxide or a mixture of argon and carbon dioxide is a suitable shielding

gas for steel filler wire. Argon + 2 % CO₂ mixture is suitable for stainless steel wires. Argon is

suitable for welding aluminium and CuSi wires. Some filler wires (referred to as self shielded)

form a gas shield from the burning composition of the wire’s core, thus eliminating the need

for a separate shielding gas supply.

BEFORE YOU START USING THE UNIT

NOTE!

Please read the separate safety instruction booklet provided before you commence welding.

Pay particular attention to the risks associated with fire and explosion.

2.1

UNPACKING

When machine leaves factory, it is set up for use with 0.8 mm diameter filler wire. If you wish

to use an alternative thickness filler wire or type, make sure that you suitably adjust the feed

roll groove, welding gun contact tip and machine polarity for the material type selected.
If you mainly use aluminium or stainless steel filler wire, we recommend you change the wire

liner to a Kemppi plastic type, which is better suited for the material.
Always before using the equipment, make sure it was not damaged during transportation.

Also check that you have received what you ordered and that there are instructions for it.
The packaging material of the products is suitable for recycling.

Transportation

The machine should be transported in an upright position.

NOTE!

Always move the welding machine by lifting it from the handle. Never pull it from the

welding gun or other cables.

Environment

The machine is suitable for both indoor and outdoor use, but it should be protected from rain

and sunshine. Store the machine in a dry and clean environment and protect it from sand and

dust during use and storage. The recommended operating temperature range is -20…+40 °C.

Place the machine in such a way that it does not come in contact with hot surfaces, sparks and

spatters. Make sure the air flow in the machine is unrestricted.

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