Mig/Mag Welding - Solter SOLMIG 180 Manual De Instrucciones

MIG/MAG WELDING

A spool of welding wire is positioned on the welder's spool holder and automatically fed through an insulated
liner in the torch to the tip. The torch assembly consists of a switch, liner, gas hose, and control cable. The
switch activates the wire feed roller and the gas flow. Conversely, releasing the switch stops the wire feed and
gas flow. The weld current is transferred to the electrode (the wire) from the contact tip at the end of the torch.
A gas cup fits over the contact tip to direct the gas flow towards the weld ensuring that the arc welding process
is shielded from oxidising air contaminates. The shielding gas also assists heating of the weld materials. The
torch is connected to the positive side of a DC rectifier, and the negative clamp is attached to the work piece.
IMPORTANT: Should you have no welding experience, we recommend you seek training from an expert
source to ensure your personal health & safety. Good Mig welding may be achieved only with
continued, supervised practice.
PREPARATION FOR WELDING
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IMPORTANT: BEFORE YOU COMMENCE, MAKE SURE THE MACHINE IS SWITCHED OFF AT THE
MAINS. IF WELDING A CAR, DISCONNECT THE BATTERY OR FIT AN ELECTRONIC CIRCUIT
PROTECTOR. ENSURE YOU HAVE READ & UNDERSTOOD THE ELECTRICAL SAFETY
INSTRUCTIONS IN CHAPTER 1.
Connecting the Earth Lead.
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To ensure a complete circuit, the earth lead must be securely attached to the work piece that is to be
welded.
a) Best connection is obtained by grinding clean the point of contact on the workpiece before
connecting the earth clamp.
b) The weld area must also be free of paint, rust, grease, etc.
c) When welding a vehicle, be sure the vehicle battery is disconnected or fit an Electronic Circuit
Protector available from your Sealey dealer.
Power Output switch. Set the switch to position 1 or 2 for welding up to 2mm thickness. Use settings
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3,4,5,6. for thicker welds.
Setting the welder controls. In principle, the lower the amperage required, the slower the wire speed.
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See setting chart below for voltage and corresponding wire speeds. Note: these settings are only a
guide and will vary according to the operator's experience.
Welding mild steel. To weld mild steel you can use CO² gas for most tasks where spatter and the high
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build up of weld do not pose a problem. Welding with a long arc reduces penetration and widens the
arc. This in turn results in more spatter. A long welding arc can be appropriate for welding butt joints in
thin materials. Welding with a short arc, at the same weld settings, results in greater penetration and a
narrower weld and reduces the amount of spatter. To achieve a consistent spatter free and flat weld,
you must use an Argon/CO² mixture.
To weld aluminium use:
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Gas Argon
0.8mm Contact Tip 0.8mm Aluminium Wire
Overload Protection. Thermostatic overload protection is provided. When an overload has occurred,
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leave the unit to cool. The thermostat will automatically reset the unit when the temperature has
returned within limits
Spot Welding. Spot welding may be carried out as shown in fig.16. It will be necessary to fit a spot
• welding gas cup.
(a) Overlapping metal sheets with a maximum thickness of 0.8 mm may be welded as indicated.
(b) Alternatively they may be welded edge to surface as indicated.
(c) For thicker sheet pre drilled holes holes may be employed.
• Use the wire feed control in conjunction with the spot weld timer beside it. To activate the timer turn the
knob clockwise. The settings indicated in the black portion of the chart are for guidance only and may
vary with operators experience.
MI03088-01