Page 59 - CITS - Welder - Trade Theory

WELDER - CITS

Fig 3

Methods used to control the arc blow
The arc blow can be controlled by:

- Place the earth connection as far from the weld joint as possible. (Fig 4)
- Changing the position of the earth connection on the work.
- Changing the position of the work on the welding table.
- Wrapping the electrode cable around the work. (Fig 5)
- Welding towards a heavy welding tack or a weld already made.
- Keeping a magnetic bridge on the top of the groove joint.

- Holding the correct electrode angle with a short arc use ‘run on’ and ‘run off plates. (Fig 6)
- If all the above methods fail to control the ‘arc blow’, change to AC supply.

Fig 4 Fig 5

Fig 6

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CITS : C G & M - Welder - Lesson 12&13