Page 50 - CITS - Welder - Trade Theory
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WELDER - CITS
ii It can be used successfully to weld both ferrous and not –ferrous metals.
iii Bare wires and light coated electrodes can be easily used.
iv Positional welding is easy due to polarity advantage.
v It can be run with the help of diesel or petrol engine where electrical main supply is not available.
vi It can be used where sheet. Cast iron and non- ferrous metals successfully due to polarity advantage.
vii It is easy to strike and maintain a stable arc.
viii Remote control of current adjustment is possible.
Disadvantages of D.C welding machine
i A higher initial cost.
ii A higher operating cost.
iii A higher maintenances cost.
iv Traubel of arc blow during welding.
v A lower working efficiency.
vi Noisy operation in the case of a welding generator.
vii Occupies more space.
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CITS : C G & M - Welder - Lesson 8&9
