Polarity Change; Wire Feed Pressure - ESAB ORIGO Mig C280 PRO Instruction Manual

GB
5.4

Polarity change

The power source is delivered with the welding wire connected to the plus pole.
Some wires, e.g self shielded cored wires, are recommended for welding with
negative polarity. Negative polarity means that the wire is connected to the minus
pole and the return cable to the plus pole.
Check the recommended polarity for the welding wire you want to use.
5.5

Wire feed pressure

Start by making sure that the wire moves smoothly through the wire guide. Then
set the pressure of the wire feeder's pressure rollers. It is important that the
pressure is not too great.
Fig 1
To check that the feed pressure is set correctly, you can feed out the wire against
an insulated object, e.g. a piece of wood.
When you hold the gun approx. 5 mm from the piece of wood (fig. 1) the feed
rollers should slip.
If you hold the gun approx. 50 mm from the piece of wood, the wire should be
fed out and bend (fig. 2).
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Fig 2
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© ESAB AB 2011