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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.
Fillet welding
The electrode should be positioned to split the angle i.e. 45º. Again the electrode should be inclined in
the direction of travel at around 10º ~ 30º.
Manipulation of electrode
In MMA welding there are three
motions used at the end of electrode:
1.
The electrode feeding to the
molten pool along axes
2.
The electrode swing right and
left
3.
The electrode moving in the weld
direction
The operator can choose the manipulation of electrode based on welding joint, welding position,
electrode spec, welding current and operation skill etc.
Weld characteristics
A good weld bead should exhibit the following characteristics:
1. Uniform weld bead
2. Good penetration into the base material
3. No overlap
4. Fine spatter level
A poor weld bead should exhibit the following characteristics:
1. Uneven and erratic bead
2. Poor penetration into the base material
3. Bad overlap
4. Excessive spatter levels
5. Weld crater
Summary of Contents for EVO 2.0 EM-200CT
Page 1: ...1 ...
Page 74: ...74 UKCA Declaration of Conformity ...
Page 75: ...75 EC DECLARATION OF CONFORMITY ...
Page 77: ...77 SCHEMATIC ...
Page 80: ...80 ...