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PATON
®
VDI SERIES MINI DC MMA
3.3 REDUCED WELDING VOLTAGE FUNCTION ARC-FORCE
The advantages ensured by the forced arcing at reduced welding voltage function are the
following:
1.
Improved arc stability in the short arc welding mode;
2.
Improved transfer of molten metal drops into the welding pool;
3.
Improved arc starting;
4.
Reduced probability of electrode sticking.
What is achieved by:
When the arc voltage is lower than the minimum voltage required for stable arcing, the welding
current increases by 30 percent relative to the set current (
see Fig. 2
)
Figure 2. Forced arcing at reduced welding voltage ARC-FORCE
3.4 PROTECTION AGAINST ELECTRODE STICKING “ANTI-STICK”
At the stage of arc starting, the electrode can stick to the workpiece and, as a result, the electrode can
be damaged due to overheating.
If the electrode has stuck to the workpiece, the welding current decreases within 0.6 … 0.8 s after the
sticking. The temporary reduction in the welding current makes it easier for the welder to peel off the
stuck electrode. After separating the electrode from the product, the welding process can be resumed
without any problems.
4. MAINTENANCE
ATTENTION!!!
Before maintenance, switch off the welding unit and
disconnect the power cable from the outlet of the power supply system. Wait
for about 5 minutes until static charges in the electrical circuits of the unit
disappear, and then perform the maintenance operations. After the completion
of works with the welding unit, apply to the unit a plate with a warning text
prohibiting switching on the unit.
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