WeldCorp ARC 140 AMP, Owner'S Operating Manual

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Page 9
WELDING BASICS
WELDING SPEED AND CURRENT
The speed and the current that you weld at has an effect on what the weld will be.
Refer to the pictures below:
The welding surface should be free of rust or paint. Choose the electrode in accordance
with the material being welded. It is advisable to initially test the electrode and amperage on
some scrap metal.
Place the electrode at a distance of 2 cm from the work piece and place the face shield in
position to protect the eyes. Strike the arc by bringing the electrode into contact with the
work piece with a light tapping and scrapping action. Through the face shield you will see
the arc which should be in length on to one and half the diameter of the electrode. It is
important to maintain a constant length of the arc. As the electrode melts and its length
decreases, a gradual downward movement is needed to maintain the correct distance and
the arc itself.
To stop welding simply withdraw the electrode away from the work piece. It is advisable to
lift into the weld seam to avoid a porous crater.
Be careful—the metal and electrode tip will be hot. Remove the surface slag when cooled
by lightly tapping with a chipping hammer. Welding may be resumed from the same spot
having first ensured the removal of the slag.