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W E L D I N G B A S I C S
The speed and the current that you weld at has an effect on what the weld will be.
Refer the pictures below:
NORMAL
WELDING
SPEED
TOO
SLOW
TOO
FAST
WELDING CURRENT
TOO
HIGH
TOO
LOW
The welding surface should be free of rust or paint. Choose the electrode in accor-
dance 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 ad-
visable 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.
W E L D I N G S P E E D A N D C U R R E N T
Summary of Contents for INVERTER 125
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