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MIG 250GS Operating manual
Having decided on a welding machine, appropriate accessories
are required. These are items such as welding cables, clamps,
electrode holder, chipping hammer, helmet, shaded and clear
lenses, scull cap, gloves and other personal protective equipment.
Messer stocks a huge range of personal protective equipment. This
combined with Messer’s extensive network ensures fast reliable
service throughout the South Pacific.
3.4 Welding Technique
Successful welding depends on the following factors:
• selection of the correct electrode
• selection of the correct size of the electrode for the job
• correct welding current
• correct arc length
• correct angle of electrode to work
• correct travel speed
• correct preparation of work to be welded.
3.5 Electrode Selection
As a general rule the selection of an electrode is straight forward,
in that it is only a matter of selecting an electrode of similar
composition to the parent metal. It will be found, however, that for
some metals there is a choice of several electrodes, each of which
has particular properties to suit specific classes of work. Often, one
electrode in the group will be more suitable for general applications
due to its all round qualities.
The table (on the next page) shows just a few of the wide range
of electrodes available from Messer with their typical areas of
application.
For example, the average welder will carry out most fabrication
using mild steel and for this material has a choice of various
standard SolidSTRIKE electrodes, each of which will have qualities
suited to particular tasks.
For further recommendations on the selection of electrodes for
specific applications, see table on the next page.
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