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GUIDE TO MMA WELDING

Before starng any welding acvity ensure that you have suitable eye protecon and

protecve clothing. Also take the necessary steps to protect any persons within the welding

area.

Fillet welding

The electrode should be posioned to split the angle i.e. 45º. Again the electrode should be inclined in the

direcon of travel at around 10º-30º.

Manipulaon of electrode

In MMA welding there are three

moons used at the end of electrode:

1. The electrode feeding to the

molten pool along axes

2. The electrode swing right and

le

3. The electrode moving in the weld

direcon

The operator can choose the manipulaon of electrode based on welding joint, welding posion,

electrode spec, welding current and operaon skill etc.

Weld characteriscs

A good weld bead should exhibit the following characteriscs:

1. Uniform weld bead

2. Good penetraon into the base material

3. No overlap

4. Fine spaer level

A poor weld bead should exhibit the following characteriscs:

1. Uneven and errac bead

2. Poor penetraon into the base material

3. Bad overlap

4. Excessive spaer levels

5. Weld crater

Jasic ARC PFC Series User Manual

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