Preparation for applying manual metal arc welding (MMA/SMAW)
Connect the work clamp (ground) to the piece to be welded. Make sure there is a good electrical
connection in the equipment. Remove any rust, paint, or any contamination using a wire brush or polisher
(grinder, angle grinder) before connecting.
If you use a metal table for welding, you should regularly check the connection of the work clamp (ground)
for signs of contamination or corrosion. A good ground connection is essential for good results in the
welding application.
Electrode ignition
Insert the electrode into the jaw of the electrode holder by pressing the lever on the electrode holder.
Make sure you have proper eye protection (face shield) before you start welding.
Note: UV radiation damage is particularly high during arc start.
To start the arc, scratch the electrode over the spot to be welded in a similar way to how a match is lit.
The 65V no-load voltage ignites the electrode quickly, and direct current (DC) allows the electrode to melt
evenly. If you are a beginner do not expect good results on the first attempt, take training courses and
courses in welding.
Bonded electrode (ANTI STICK)
If the electrode does not ignite, or the arc goes out while the electrode is being welded, it may stick to the
part to be welded. This situation is detected by the electronic board of the equipment and the welding
current is automatically reduced. This allows you to free the stuck electrode from the surface to be welded
by moving it back and forth.
While the electrode is attached, a protection is activated, driving output current near to 0. A short circuit
between the electrode holder and the ground is indicated in the same way. If the electrode cannot be
detached, separate the electrode holder and remove it manually using the appropriate protection and
tweezers. Be careful as the electrode can be very hot.
Duty cycle excess protection or thermal control device.
When there is protection by reaching the maximum duty cycle, or by internal heating of the machine, the
arc is extinguished and the protection of the machine is activated, while the welder cools down to continue
its normal operation. Do not turn off the welder, allow the fans of the equipment to cool the machine's
power components until the machine protection deactivates. Only until this moment can the machine be
switched off or start welding again.
Note: to preserve the power components of the welding machine from heat accumulation, do not
disconnect it immediately after activation of the protection, as described above.
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