Working Procedures - STAMOS S-Multi 41 Manuel D'utilisation

WORKING PROCEDURES

Argon arc welding (TIG)
Cleaning before welding
The tungsten arc welding is very sensitive to contamination of the surfaces to be pro-
cessed. Therefore prior to welding all traces of paint layers, lubricant left after manuf-
acturing and oxidized film have to be removed.
DC Argon arc welding (DCTIG)
• Connect the gas hose to the gas input port of the welder.
• Connect the gas hose of the welding pistol to the argon port of the welder.
• Connect the workpiece to be processed to the ground terminal of the welder
output (+).
• Attach the connector of the welding torch to the argon arc control socket
Gas test: Ensure that power is being supplied and turn the machine on, open the argon
cylinder valve and press the switch of the flow measurement device. Hold the pistol
switch and select the appropriate argon flow. Release the switch and the gas flow will
turn off automatically after a few seconds. If high-frequency arc ignition is used, the
tungsten electrode should be removed 2-3 mm before coming in contact with the
workpiece. Press the switch and the arc will be ignited. When the switch of the welding
torch is turned off again, the welding current is reduced and the arc stops working
immediately. The welding torch can not be removed before stopping the arc. Let the
protective gas cool to prevent oxidization of the weld. When the welding process is
finished, turn off the argon cylinder switch and disconnect the power supply of the
welder. Do not pull the power plug out when the switch is turned on
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Manual welding with electrode
• Connect the MMA hose to the minus pole (-).
• Set the current control to the appropriate welding current (pulse current con-
trol to minimum position). Use the empirical formula: I = 40d, d is the diameter
of the electrode.
• Positive and negative connection during welding.
• Connect the welder to the power circuit, then press the power switch and the
power indicator light comes on.
• Observe the relative weld current value and the duty cycle of the machine.
Overloading can cause damage and should be avoided.
• After using the welder you should leave it to cool down and only then turn off
the power switch
MAINTENANCE
Check the pistol for wear damage, cracks or exposed wire sections. Replace or repair
any such defects before using the device. A heavily worn pistol tip/nozzle contributes
to the reduction of speed, voltage drops and crooked cuts. An indication of a worn
pistol tip/nozzle is an elongated or oversized nozzle opening. The external part of the
electrode may be recessed no more than 3.2 mm. Replace the electrode if it is worn,
as indicated by the above measurement. If the cap cannot be re-attached easily, check
the thread.
Weekly activities
Check that the ventilation is working properly.
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