stayer CITYWORK 160 Instructions D'emploi page 29

(duty cycle) from room temperatures over 40ºC.
4.- OPERATING INSTRUCTIONS
PLACEMENT AND TESTING
All the MMA STAYER WELDING series must be manipulated
by its habilitated transport handler. A free space of at least 15cm
around the machine must be habilitated, as well as securing a
free air circulation for a correct heat dissipation.
Before any kind of work, the right condition and the proper
tightening of all the equipment external elements must be
verified: power supply plug, cable, chassis maintenance and
connection borne and switches.
TOOLS REPLACEMENT
All the Stayer Welding series machines own a quick half-
inch or 3/8-inch DINSE connector for the welding cables. For
connecting or removing the connector, it is enough to turn right
or left a quarter turn thereof.
PRECAUTION: Always fully connect the DINSE
connector and make sure the joint with the cable
is in good condition and the contact surface is
cleaned. A bad joint or a dirty connection will
reduce the performance and will produce an overheating,
melting itself or the frontal panel burnt.
ADJUSTMENT OPERATIONS
All the Stayer Welding machines contain a complex electronic
system and are completely calibrated, so it is not allowed for
the user to manipulate the unit because of safety and efficiency
reasons. If any doubt of malfunction, please, contact your
supplier or our customer service system.
WORKPIECE SIZE LIMITS
The main restriction about the welding piece size is its
thickness, which is limited by the equipment power.
The higher the power is, the thicker the proper welds the user
will be able to create will be (with an adequate penetration of
the welding cord).
The following table may be worth of orientation:
WORKPIECE E6013 ELECTRODE
THICKNESS DIAMETER
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 USE INSTRUCTIONS
Before starting, make sure you read, comprehend and apply
all the safety instructions as well as the rest included in the
present manual.
Then, you will find a series of general indications that will help
you to introduce yourself in the world of welding and know how
to efficiently work.
In the present manual, you will be instructed about the
coated electrode welding rudiments, of a relatively moderated
execution difficulty, and TIG welding, of a relatively higher
difficulty. Take into account that professional welding is a
qualified and specialized activity. Refer to specialized books
and regulated professional training for more information.
1.- Duty cycle and protection input
Duty cycle refers to the time where the unit is able to work with
a specific output characteristic.
This time is measured as a 10-minute period percentage. Tests
are done with air at 40ºC
For example, a 120A unit at a 30% duty cycle will be able to
work at 120A for 3 minutes straight. Then, the user will have
to wait for 7 minutes before going back to work for another 3
minutes.
An equipment working at a 100% duty cycle will be able to do
a continuous non-stopping work as long as the air temperature
does not go higher than 40ºC.
When the unit works over the indicated working time on its
plate, it may lead to the situation where it stops and enters
itself in a protection cooling mode. This is indicated through
a yellow LED light included in all the models, except for the
CITIWORK range in which will be shown through the message
"HEA" on its display while being in this protection mode.
1.- Coated electrode welding
In this type of electric arc welding, the electrode itself produces
heat through an electric arc due to the environment protection,
the improved electrode coating and the filler metal of the
electrode metallic soul merging while welding.
You must choose the adequate electrode (type and size)
according to the work you are going to do. The electrode we
recommend because of its medium characteristic, validity for
most of the works and easiness to find, is the E-6013. Better
known as "rutile electrode". The coated electrode welding
material par excellence is carbon steel. The attached table may
be helpful as an initial orientation for choosing the electrode
type and operation amperage adjustment for a S275 type
medium carbon steel.
After confirming all the security measurements and the
equipment inspection, cleaning, preparing and holding the
welding piece, the cords are connected according to the table
indications. For a casual use of the E-6013 electrode, the
negative polarity output (marked with a -) will be plugged to
the piece through the earth clamp. The positive polarity output
(marked with a +) will be plugged to the electrode holder
clamp, which will have the working electrode connected to its
bare extreme.
The welder must wear their individual protection equipment
using mask or welding helmet, all adequate for the work, and
covering every inch of their skin to avoid radiation or welding
AMPERAGE
splashing.
ADJUSTMENT RANGE
The arc priming weld will take place. There are various
30 - 60
procedures, being the piece scraping the simplest one.
50 - 70
Once the arc is started, the electrode will be put at an
approximated distance equal as the same electrode diameter.
60 - 100
Then, the welding progress will start, pulling back as if an
85 - 140
Occidental right-handed person was writing. The electrode
120 - 190
must be kept in an almost vertical position (65º to 80º),
regarding to the horizontal one, and balanced regarding to
180 - 350
weld coating.
Depending on the pass type (filler or initial) and the union
coverage need, keep going in a straight line, a zig-zag
movement or small circles. A good welding position, speed and
intensity adjustment will result in a nice and soft sound, similar
to the one of a good barbecue roast. When a proper work is
done, the resulting cord will be homogeneous, with uniform
half-moon surface marks. The transversal profile will not be
either protuberant nor collapsed. The formed dirt will be easily
removed.
Once the weld rod is done, you must remove the dirt with a
hammer before doing a possible following one.
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