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GUIDE TO MMA WELDING
Before starting any welding activity ensure that you have suitable eye protection and
protective clothing.
Also take the necessary steps to protect any persons within the welding area.
MMA process tips and guides
Typical welder set up
1. Electrode holder
2. Work return clamp
3. Work piece
4. Weld material covered
by electrode flux or slag
5. Electrode
6. Distance from work to
electrode (arc Length)
Welding current will flow in the circuit as soon as the electrode contacts the work piece. The welder
should always ensure a good connection of the work clamp. The nearer the clamp is placed to the
welding area the better.
When the arc is struck the distance between the end of the electrode and the work will determine the
arc voltage and also affect the weld characteristic. As a guide the arc length for electrodes up to 3.2mm
diameter should be around 1.6mm and over 3.2mm around 3mm.
Upon completion of the weld the welding flux or slag will need to be removed usually with a chipping
hammer and wire brush.
Joint form in MMA
In MMA welding, the common basic joint forms: butt joint, corner joint, lap joint & T joint.
Summary of Contents for EVO 2.0 EM-160C
Page 1: ...1...
Page 75: ...75 UKCA Declaration of Conformity...
Page 76: ...76 EC DECLARATION OF CONFORMITY...
Page 78: ...78 SCHEMATIC...
Page 82: ...82...
