PATON VDI SERIES ECO DC MMA
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Pic. 4. Forced arcing at reduced welding voltage ARC-FORCE
3.3. PROTECTION AGAINST ELECTRODE STICKING (“ANTI-STICK”)
In 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 in 0.6 … 0.8 s after the
sticking. In this case, the welder can detach the electrode from the workpiece without risk to damage
eyes because of random arc starting. After the detachment of the electrode, the welding can be
continued.
4. MAINTENANCE
WARNING!!!
Before maintenance, switch off the welding unit and remove
the plug of the power cable from the electrical outlet of the power supply
system. Wait for about 5 minutes until static charges in the unit circuits are
removed, and then perform the maintenance operations. After completion of
works with the welding unit, apply to the unit a warning plate with a text
prohibiting switching on the unit.
For ensuring the operability of the welding unit for a long-term service life, it is necessary to perform
the following procedures:
Periodically, at specified time intervals, check that the safety requirements in operation of the
welding unit are fulfilled (see Section 11, "Safety instructions").
At half-yearly intervals, purge the welding unit with dry compressed air.
When working in environment with excessive dust content, manually clean the passages for
cooling air.
WARNING!
Purging of the unit from a short distance can result in damage
of the electronic elements of the unit.
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