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CONNECTION TO THE POWER SUPPLY.
Before connecting the power cord (5) to the power supply, make sure the data on the nameplate
matches this latter's values. Connect the machine to a socket with suitable protective devices and
ground connection. Make sure all connections are solid to avoid bad contacts and overheating.
8. WELDING PROCESSES.
8.1. ELECTRODE WELDING PROCESS (MMA).
The electric arc increases the temperature of the materials to their melting point, allowing the
electrode to provide the material that, when melted, attaches to the metal pieces to be welded.
During the process, the coating of the electrode generates a gas that stabilizes the current arc,
protecting the welding from contamination, and is deposited as slag on the weld bead.
EXECUTION OF WELDING WITH COATED ELECTRODE.
After having made all the necessary electrical connections, both the power cable and the welding
cables, and having selected the electrode diameter and current intensity, proceed as follows:
1. Electrode
2. Coating
3. Nucleus
4. Electric arc
5. Protective gas
6. Melted metal
7. Slag
8. Weld bead
Fix the uncoated end of the electrode in the electrode
holder and connect the ground clamp to the piece to be
welded, always ensuring poper electrical contact. Cover
your eyes and face with the protection screen and try to
rub the tip of the electrode on the piece to be welded,
following a movement as if you wanted to light a match;
This is the most correct method to generate the arc.
Replace the electrode when its tip is only 2-3 cm away
from the electrode holder.
CAUTION: DO NOT TAP the electrode on the
piece as the coating could be damaged, making it more
difficult to attract the arc. Once the arc is achieved, try
to maintain a distance from the piece equivalent to the
diameter of the electrode used, and keep this distance
as constant as possible during welding, remembering
that the forward inclination of the electrode must be
between 20 and 30 degrees.
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