Weldclass WeldForce WF-140ST, Operating Instructions Manual

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32 © Weldclass | E.&O.E. | Edition 1.1 | 2019.05.03
11.8.3 Vertical Welds
11.8.3.1 Vertical Up
Tack weld a three feet length of angle iron to your work bench in an upright position. Use a 3.2mm
Weldclass 12V Stick electrode and set the current at 100 amps. Make yourself comfortable on a seat
in front of the job and strike the arc in the corner of the fillet. The electrode needs to be about 10º
from the horizontal to enable a good bead to be deposited.
Refer Figure 29.
Figure 29
Use a short arc, and do not attempt to weave on the first run. When the first run has been completed
deslag the weld deposit and begin the second run at the bottom. This time a slight weaving motion
is necessary to cover the first run and obtain good fusion at the edges.
At the completion of each side motion, pause for a moment to allow weld metal to build up at the
edges, otherwise undercut will form and too much metal will accumulate in the centre of the weld.
Figure 30 illustrates multi-run technique and Figure 31 shows the effects of pausing at the edge of
weave and of weaving too rapidly.
Figure 30
Figure 31
11.8.3.2 Vertical Down
The Weldclass 12V Stick electrode makes welding in this position particularly easy. Use a 3.2mm
electrode at 100 amps. The tip of the electrode is held in light contact with the work and the speed
of downward travel is regulated so that the tip of the electrode just keeps ahead of the slag. The
electrode should point upwards at an angle of about 45º.