Migomag SIM 200 LCD - Page 33

Migomag SIM 200 LCD
Model No ASIM200LCD
30
2.5 Judge a good weld bead
When the trick of establishing and holding an arc has been learned, the next step is
learning how to run a good bead. The rst aempts in pracce will probably fall short of
acceptable weld beads. Too long of an arc will be held or the travel speed will vary from
slow to fast. See following:
A. Weld speed is too fast
B. Weld speed is too slow
C. Arc is too long
D. Ideal weld
A solid weld bead requires that the electrode be moved slowly and steadily along the
weld seam. Moving the electrode rapidly or erracally will prevent proper fusion or create
a lumpy, uneven bead. To prevent ELECTRIC SHOCK, do not perform any welding while
standing, kneeling, or lying directly on the grounded work.
2.6 Finish the bead
As the coang on the outside of the electrode burns o, it forms an envelope of
protecve gasses around the weld. This prevents air from reaching the molten metal and
creang an undesirable chemical reacon. The burning coang, however, forms slag. The
slag formaon appears as an accumulaon of dirty metal scale on the nished weld. Slag
should be removed by striking the weld with a chipping hammer.