Mma Welding; Maintenance - ESAB Tig 150i Instruction Manual

GB
7.2

MMA welding

Tig 150i/Tig 200i gives direct current, and you can weld most metals to alloy and
non--alloy steel, stainless steel and cast iron.
The Tig 150i allows you to weld most coated electrodes from ∅ 1.6 to ∅ 3.25.
The Tig 200i allows you to weld most coated electrodes from ∅ 1.6 to ∅ 4.0.
MMA welding may also be referred to as welding with coated electrodes. Striking the arc
melts the electrode, and its coating forms protective slag.
If, when striking the arc, the tip of the electrode is pressed against the metal, it im-
mediately melts and sticks to the metal, rendering continued welding impossible.
Therefore, the arc has to be struck in the same way that you would light a match.
Quickly strike the electrode against the metal, then raise it so
as to give an appropriate arc length (approx. 2 mm). If the arc
is too long, it will crackle and spit before finally going out com-
pletely.
If you are working on a welding bench, check before attempting
to strike the arc that residual waste metal, pieces of electrode
or other objects do not insulate the part to be welded.
Once the arc has been struck, move the electrode from left to
right. The electrode must be at an angle of 60
relation to the direction of welding.
When you want to weld wide beads, or when you want the weld
to be so thick that you have to weld in a number of layers, how-
ever, you have to use lateral movements.
8

MAINTENANCE

Regular maintenance is important for safe, reliable operation.
Note!
All guarantee undertakings from the supplier cease to apply if the customer himself
attempts any work in the product during the guarantee period in order to rectify any
faults.
The Tig 150i/Tig 200i requires little maintenance. In normal cases, it is sufficient to
blow it clean using dry compressed air once a year, but this should be done more
often if it is set up in a dusty, dirty area.
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to the metal in
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