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General operation recommendations (see fig. 3-4)
The recommendations below apply to all
machines connected through a socket
connector. In the case of stationary con-
nection the machine assembly and net-
work connection will be done beforehand.
• Place the machine in an even, dry, not vibrating surface
observing all above-mentioned safety procedures�
• Connect the ground wire�
• Connect the welding cables to the machine� Welding
can be performed with direct and reverse polarity�
The selection of polarity depends on the materials to
be welded and the recommendations on how to use
electrodes�
• Direct polarity - connect electrode holder 14 to
socket "-" 10, connect earth clamp 13 to socket "+" 11�
In such a mode the electrode heats less than the ba-
sic metal, the electrodes get fused slower, the weld-
ing joint is completed with a deeper penetration�
• Reverse polarity - connect electrode holder 14
to socket "+" 11, connect earth clamp 13 to sock-
et "-" 10� In such a mode the work piece is heated
less than the electrode which can be used for weld-
ing high-carbon, alloy and special steels sensitive to
overheat as well as for welding sheet metal�
• Press the lever of the electrode holder 14 and install
the electrode end (the end free from coating) into
electrode holder 14 and then release the lever�
• Fix earth clamp 13 on one of the parts to be welded�
• Connect the machine to the mains and switch it on�
• Set the welding current value using control 5� The
selection of welding current depends on the electrode
to be used, thickness of material to be welded, spatial
position of a seam etc�
• Choose additional welding parameters (arc force
etc), if your machine has these functions�
• Ignite the welding arc in one of two ways: ignition by
touching (see fig. 3.4); ignition by scratching (see fig. 3.5).
• The main practices of welding electrode handling
are described below:
• usually welding is carried out with vertically
positioned electrode or at its inclination concerning a
seam, in a corner forward or back� When welding by
a corner back, it is provided better fusion and smaller
width of a seam (but performance of work in this case
demands the certain skill);
• progressive motion of an electrode (see fig. 4.1) -
on a direction of an axis of the electrode, for maintenance
of necessary arch length which should make 0,5-1,1 of
electrode diameter� The length of an arch renders the
serious influence on quality of a welded seam and its
form� A long arch causes intensive oxidation and nitra-
tion of the fused metal, and increased splashing of it;
• longitudinal movement of an electrode (see
fig. 4.2) - for formation of a welded seam� Speed of
movement of an electrode depends on electric current,
electrode's diameter, type and spatial position of a seam;
at the high speed of an electrode the basic metal
has no time for fusion, what results in insufficient
depth of weld fusion spill is formed;
insufficient speed of moving of an electrode results
in overheating and arc burn (through fusion) of metal;
correctly chosen speed of longitudinal movement
along an axis of a welded seam allows obtaining its
width on 2-3mm more than diameter of an electrode;
The manufacturer reserves the possibility to introduce changes.
• lateral movement of an electrode (see fig. 4.3) - for
formation of the widened welded seam� An electrode
is moved in lateral oscillatory movements more often
with constant frequency and the amplitude, combined
with progressive motion of an electrode along an axis
of the prepared groove, and to an axis of an electrode�
Lateral oscillations of an electrode are various and are
determined by the form, the sizes, positions of a seam
in space in which welding is carried out, and skill of the
welder� The width of a welded seam in this case should
not exceed 2-3 diameters of an electrode�
• Watch the electrode length and when 20-30mm is left
to the electrode holder 14 jaws - replace the electrode�
• Wait for cooling down and crystallization of slag on
a welding seam upon which remove the slag using a
special hammer and a brush� You must wear protective
gloves or a mask when performing these operations�
• Check the welding seam quality and when the faults
are found remove them�
• Following the completion of work, let the machine
cool down, switch it off and then disconnect the cables�
Machine maintenance /
preventive measures
Before carrying out any works on the machine it
must be disconnected from themains.
Cleaning of the machine
An indispensable condition for a safe long-term
exploitation of the machine is to keep it clean� Regularly
flush the machine with compressed air thought the
vent holes 3�
After-sales service and application service
Our after-sales service responds to your questions
concerning maintenance and repair of your product as
well as spare parts� Information about service centers,
parts diagrams and information about spare parts can
also be found under: www.dwt-pt.com�
•
Categorically not to drop any mechanical impact on
the packaging during transport�
• When unloading / loading is not allowed to use
any kind of technology that works on the principle of
clamping packaging�
Recycle
disposing as waste.
Machine, accessories and packaging should
be sorted for environment-friendly recycling�
The plastic components are labelled for categorized
recycling�
These instructions are printed on recycled paper
manufactured without chlorine�
English
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Transportation
of the machine
Environmental
protection
raw
materials
instead
of
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