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Operation
1. Setting the adequate amperage
It is capable of welding with 2.5mm, 3.2mm and 4mm electrodes.
There is no golden rule that determines the exact amperage required for every particular situation. It is
best to practice your welds on scrap metal which matches the metals you intend to work with in order
to determine correct settings for your job. The electrode type and the thickness of the metal workpiece
define the amount of heat needed in the welding process. Heavier and thicker metals require more
current (amperage), whereas lighter and thinner metals require less current (amperage).
2. Welding techniques
The best way to teach yourself how to weld is with short periods of practice at regular intervals. All
practice welds should be done on scrap metal that can be discarded. Do not attempt to make any
repairs on valuable equipment until you are satisfied with yourself and your practice welds are of good
appearance and free of slag or gas inclusions.
2.1 Holding the electrode
The best way to grip the electrode holder is the way that feels most comfortable to you. To position the
electrode on a workpiece when striking the initial arc, it is necessary to hold the electrode perpendicular
to the workpiece. Once the arc is started the angle of the electrode in relation to the workpiece should
be between 10 and 30 degrees. This will allow good weld penetration, with minimal spatter.
2.2 Striking the arc
WARNING
EXPOSURE TO A WELDING ARC IS EXTREMELY HARMFUL TO THE EYES AND SKIN.
• Never strike an arc or begin welding until you have adequate protection.
• Wear flameproof welding gloves, heavy long-sleeved shirt, cuffless trousers, high-topped shoes and
a welding helmet or shield.
Scratch the work piece with the end of electrode to start arc and then raise it quickly to about 3 mm
gap between the rod and the workpiece. Please observe the following picture:
It is important that the gap is maintained during the welding process and it should be neither too wide
or too narrow. If it is too narrow, the rod will stick to the workpiece. If it is too wide, the arc will be
extinguished. It takes a a lot of practice to maintain the gap. Beginners may usually get sticking or arc
extinguishing. When the rod sticks to the workpiece, gently rock it back and forth to separate it from
the workpiece. If you don't, the short circuit occurs, which leads to welder overload. A good arc is
Содержание MIG 180-5
Страница 20: ...22 C Lift the welding torch to the normal position to initiate the arc and start welding ...
Страница 22: ...24 Spare parts listing ...
Страница 49: ...51 Κατάλογος ανταλλακτικών ...
Страница 74: ...76 Sklopni crtež rezervnih delova ...
Страница 99: ...101 Sklopni crtež rezervnih delova ...
Страница 127: ...129 Skica notranjosti naprave ...