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4.- OPERATING INSTRUCTIONS
PLACEMENT AND TESTS
All STAYER WELDING machines of the MMA series must
be handled by means of the belt handle which is enabled for
transport. A free space of at least 15 cm must be provided
around the equipment, and free circulation of air must be
secured for a correct heat dissipation.
Before each work, the good status and correct tightening
of each of the external elements of the equipment must be
verified: power supply plug, cable, carpentry of the casing
and connection terminals and switches.
CHANGING TOOLS
All STAYER WELDING machines of the MMAseries have a
DINSE half-inch or 3/8 inch quick connector for the welding
cables. For removing or putting the connector it is sufficient
to turn the connector a fourth of a turn leftward or rightward.
ATTENTION: Always turn the DINSE connector to
the limit and make sure that the junction with the
cable is in a good status and that the contact surface
is clean. Abad junction or a dirty junction lead to a
bad yield and will cause the front panel to heat up,
fuse or burn.
ADJUSTING OPERATIONS
All STAYER WELDING machines of contain a complex
electronic system and are provided ex works in a completely
calibrated status, so that the user is not authorized to
manipulate it for reasons of efficiency and safety. In the case
of any doubt concerning bad functioning please contact your
dealer or our customer service system.
LIMITS OF THE SIZE OF THE WORK PIECE
The main restriction on the size of the piece to be welded
is the thickness thereof that it limited by the power of the
equipment. The higher power is, you will be able to make
correct welds (with an adequate penetration of the weld
bead) in pieces of major thickness. The following table may
serve as an orientation.
THICKNESS OF
ELECTRODE
THE PIECE TO BE
DIAMETER E6013
WELDED
1 a 2 mm
1,6mm
1,5 a 3mm
2,0mm
2,5 a 5mm
2,5mm
5 a 8mm
3,2mm
8 a 12mm
4,0mm
More than 12mm
5,0 - 6,0mm
GENERAL INSTRUCTIONS FOR USE
Before starting, make sure that you read, understand and
apply the safety instructions and the rest of the instructions
included in the present manual.
Hereinafter you will find a series of general indications that
will allow you to initiate yourself in the world of welding and
to start to work efficiently.
Instruction on the rudiments of welding by means of coated
electrodes with a relatively moderate level of execution and
on TIG welding having a relatively higher difficulty is provided
in the present manual. Please take into account that, at a
professional level, welding is a qualified and specialized
activity. Please refer to specialized books and regulated
professional training courses for more information.
1.- Welding with coated electrode
In this class of electric arc welding, the electrode itself
produced the heat in the form of an electric arc, the protection
ambient and improves the weld coating and the filler metal
when the metal core of the electrode fuses in accordance
with the weld being made.
You must choose the electrode (size and type) that is
adequate for the kind of work to be carried out. The electrode
we recommend due to its mean characteristic, validity or the
major part of works and for being the easiest one to find, is
the E-6013 electrode commonly known as "rutile electrode".
The material par excellence to weld with a coated electrode is
carbon steel. The following table may serve you as an initial
orientation for electing the type of electrode and amperage
adjustment of the operation for medium-type carbon steel of
the S275 type.
After having confirmed all safety measures and inspected
the equipment, cleaned, prepared and fastened the material
to be welded, the cables are connected in accordance with
the indications in the tables. For the usual case of the E-6013
electrode, the output with negative polarity (marked -) is
connected to the piece by means of the mass clamp.
The output with positive polarity (marked +) is connected to
the electrode carrier clamp that has the working electrode
connected to it by its blank end.
The welder must put on his individual protection equipment
using a welding mask or helmet that is adequate for the work
and adequately covers any portion of his skin so as to avoid
spills or radiation.
Welding is started by priming the arc. There are various
processes, the simplest one being scraping the piece.
Once the arc ha started, the electrode is held at a distance
AMPERAGE
that is approximately equal to the diameter of the electrode
ADJUSTING RANGE
itself, and the advance of the weld is initiated by pulling
30 - 60
backwards as if a righthanded occidental person was writing.
The electrode will be kept in a position near (65º to 80º) to the
50 - 70
vertical line with respect to the horizontal line, and balanced
60 - 100
with respect to the weld coating center, depending on the kind
85 - 140
of passing (initial or filling) and the need of covering the joint to
advance in a straight line, zigzag movement or small circles.
120 - 190
A good adjustment of the intensity, position and advancing
180 - 350
speed of the welding results in a pleasant, soft sound that is
similar to the sound of grilled meat on a barbecue. When the
work is carried out correctly, the resulting weld bead will be
homogeneous, with surface marks in the shape of uniform
half-moons. The transverse profile will not be protruding and
the slag formed can be removed easily.
Once the bead has been carried out, remove slag with the
hammer and brush before carrying out a possible subsequent
bead.
Special settings for CEL XP, PFC, S250DV AND S400T
series (Fig 6, 7, 9)
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