Page 52 - CITS - Welder - Trade Theory
P. 52
WELDER - CITS
3 Short arc length: If the distance between the tip of the electrode and the base metal is less than the dia of the
core wire. It is called the short arc.
Effect of medium arc length
i This is a stable arc producing steady sharp cracking sound and causing.
ii Even burning of the electrode.
iii Reducing of spatters
iv Correct fusion and penetration.
v Correct metal deposition.
Effect of long arc length
i It makes a humming sound causing
ii Unstable arc.
iii Oxidation of weld metal.
iv Poor fusion and penetration.
v Poor control and molten metal.
vi More spatter, indicating wastage of electrode metal
Effect of short arc length
i It makes a popping sound causing.
ii The electrode melting fastly and trying to freeze with the job.
iii Higher metal with narrow with bead.
iv Less spatters.
v More fusion and penetration.
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CITS : C G & M - Welder - Lesson 10&11
