Magmate MMA 140, Руководство по эксплуатации

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same time, the electrode is fed downwards to
keep the correct arc length at all times.
Correct travel speed for normal welding
applications varies between approximately
100 and 300 mm per minute, depending on
electrode size, size of run required and the
amperage used. Excessive travel speeds lead to
poor fusion, lack of penetration etc, while too
slow a rate of travel will frequently lead to arc
instability, slag inclusions and poor mechanical
properties.
Correct work preparation
The method of preparation of components to
be welded will depend on equipment available
and relative costs. Methods may include sawing,
punching, shearing, machining, fl ame cutting
and others.
In all cases edges should be prepared for the
joints that suit the application.
Generally Recommended Current Range
for MMA electrodes
Size of Electrode (mm) Current Range (Amp)
2.5 60–95
3.2 110–130
4.0 140–165
5.0 170–260