Practical Welding Exercise
The Drag Technique involves attempting to allow the electrode to consume with as little interference as possible.
Providing the electrode remains in contact with the work it will be consumed at a specific rate, this rate is a direct consequence of the current and the lead angle thus; the drag technique tends to lead to a natural characteristic welding speed. To allow for minor changes in travel speed, an increase in the lead angle will result in a slower rate of travel. Conversely, a shallow lead angle will result in an increase in travel speed. An angle of between 35 - 45° is used as this allows for safe bubble departure, which would otherwise cause turbulence in the weld puddle.