Page 51 - CITS - Welder - Trade Theory
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WELDER - CITS



          Lesson 10&11 : Topic- Arc length-types-effects of arc length



            Objectives
           At the end of this lesson you shall be able to
           •  define and identify the different types of arc lengths
           •   explain the effects and uses of different arc lengths



           Arc length - It is the straight distance between the electrode tip and the job surface when the arc is formed. There
           are three

           Types of arc length
           1  Medium or normal arc length (Correct arc length)
           2  Long arc length.
           3  Short arc length.

           1  Medium or Normal Arc length: The correct arc length or normal arc length is approximately equal to the
              diameter of the core wire of the electrode.
























           2  Long arc length: If the distance between the tip of the electrode and the base metal is more than the diameter
              of the core wire it is called a long arc































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