Truper PRETUL 29958, Руководство пользователя, Страница: 9 / 28

VRD
9
Start Up
B
C
E
D
VRD security system
• Activate the VRD (Voltage Reduction Device) system by
pressing the button (
F
) to reduce voltage during the bait
phase to prevent possible discharge to the operator.
• It is recommended to activate it in risky situations, such
as when welding in confined spaces, wet environments,
working in heights and in mining industry.
• When the VRD system is
activated it is necessary to force
contact between the electrode and
the workpiece for up to two
seconds to generate the arc and
start welding.
F
A
45°
45°
45° 60°
60°
60°
Electrode Replacement
SMAW:
• When the electrode has burned 0.4” to 0.7” from the
electrode holder, replace wit with a new one to be able to
keep on welding.
• The electrode burns in high
temperatures. Do not try to handle the electrode remains
with your hand. Put the remains in a metal container.
• Open the electrode holder tong to hold the uncovered
end of the new electrode. Do not hold the electrode in the
covered part.
TIG:
• Tungsten electrodes shall be sharpened to guarantee the
weld quality in a longitudinal direction.
• The tungsten electrode tip gets deformed due to the
heat. Therefore, when the tip is not showing an angle, it is
recommended to sharpen it again.
CAUTION
Preparation
• Only through experience, practice and care a good welding
process can be guaranteed.
• The factors arousing in the welding process are many: current
required, distance between the electrode and the work piece,
speed and direction of the welding, thickness and type of material,
position of the work piece and welding direction, and also, the
gauge, material and covering of the electrode. Thus, it is advisable
that before carrying out a weld, try to practice in scrap material to
determine which are the specific requirements for the job ahead.
• The area in the work pieces where the weld is to be applied shall
be clean, free of oxidation and paint.
• The joints between sheets with calibers larger than 1/8” shall be
beveled so the weld will be adequate (
A
).
Slag Removal
• Upon finishing the welding job, use a wire brush to
remove slag from the welding joint surface.
• Wait until the slag has cooled down
and hardened to be able to remove it.
• When hitting or brushing slag to remove it, there can
be particles shooting out. Wear eye protection and
keep bystanders away.
CAUTION
Welding
• Set the switch ( B ) in the ON position I .
• Adjust the current control adjustment (
C
) until reaching the
adequate arch current and intensity suitable for the job.
Current is indicated in the panel screen ( D ).
• Hold the electrode holder or torch in the most comfortable
position possible. Be aware that during the welding process, the
angle, movement and distance with regards to the work piece shall
be constant and uniform.
• Aim the electrode tip towards the joint to be welded to generate
the electric arch and be able to start welding.
• Once the arch is ON start welding, keeping always the electrode
tip 0,08” away from the work piece. If welding with the electrode
onto the work piece, it could stick and the weld would have a poor
quality.
• In the event of overheating, the welder will stop working and the
two thermal protection indicating lights ( E ) will be ON. Do not turn
OFF the welder. Wait for the indicator lights turns OFF to use it
again.
Welding Current (A)
20
20 - 100
100 - 200
Electrode Angle
30º
60º - 90º
90º - 120º
ENGLISH