Zenit Powertools MMA-200/2, Instruction Manual

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must be performed when the machine is
disconnected from the supply line.
Welding cable with electrode holder is
connected to the positive pole (+) (see
«Welding»).
Cable with functional terminal is
connected to the negative pole (-), its
other end is connected to the piece to be
welded or operating area as close to the
welding seam as possible.
WARNING! Connected cables
must be inserted securely in the
terminals, which will ensure good
contact. Loose connections will lead to
overheating, timely wear, loss of
efficiency and damage to the terminals.
Do not use welding cables of more than
10 m in length.
Never use metallic constructions which
are not the part of the piece to be welded
instead of cable with functional terminal,
as this will violate safety and lead to poor
welding.
welDinG
WARNING! Most welding electrodes are
connected to the positive pole, although
some types have to be connected to
the negative pole. It is important to
follow manufacturer’s instructions on
the package of the electrodes, as they
indicate right polarity of the welding
electrode as well as the most suitable
current for welding operations.
Adjust welding current according to
diameter of used electrode and according
to type of welding seam. Below is the
table of admissible current according to
diameter of the electrode:
Electrode
diameter, mm
Welding current, А
Min Max
1,6 25 50
2 40 80
2,5 60 110
3,2 80 160
4 120 200
Pay attention, that depending on the
diameter of the electrode, higher values
of welding current are used for welding
in lower position, whereas vertical
welding (or welding in vertical position,
so called «overhead welding») requires
lower values of welding current.
Except for welding current power
mechanical characteristics of the welding
seam are determined by other parameters:
- diameter and quality of the electrode;
- arc length;
- speed and position of welding;
- proper storage of electrodes (they
must be protected from environmental
exposure and kept in a special package).
welDinG
When welding ALWAYS wear protecting
mask with special goggles for eye
protection from strong light emission,
generated by electric arc. Mask allows
watching the process of welding and
protects the user.
Keeping mask IN FRONT OF YOUR
FACE, lead the electrode on welding
area. Hand movement must resemble
lighting a match. This is the right way to
strike the arc.
WARNING! Never knock with
electrode trying to strike the arc, as this
may lead to its damage and will hamper
arc striking.
As soon as the arc is struck, try keeping
the distance from welding point equal
to electrode diameter. Remember that
electrode angle when moving should be