Sweiss SKYMAX 2040 Nx Manual De Usuario página 78

12. WELDING OPERATION
12.1. WELDING ARC START
Knocking arc: take the electrode upright to touch the workpiece, after forming short circuit, quickly lift
up about 2~4 mm, and arc will be ignited. This method is di cult to master. But in the welding for the
brittle or hard steel, it is better to use knocking way.
12.2. ELECTRODE MANIPULATION
In MMA welding, there are three movements to being matched in the end of electrode: the electrode
moving to the molten pool along axes; the electrode swing right and left; the electrode moving along
welding way.
The operator can choose the manipulation of electrode based on welding joint sharp, welding position,
electrode spec, welding current and operation skill, etc.
The details please refer to 《 Welding Dictionary》 P69, Volume 1 of Edition 2.
Starting the arc: scrape the electrode against
the workpiece to start the arc. The electrode
should be scraped and lifted over the
groove.
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