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© ESAB AB2012
5.5 Gas Check / Weld mode (Pos 12)
Gas check is used to measure that gas flow or to flush the gas hoses to clean them of any air and
moisture before commencing welding. Gas check is carried out with the voltage and wire feed
switched off.
5.6 2-stroke /4-stroke (Crater on/off) (Pos 11)
With 2 stroke, wire feed starts when the trigger switch is pressed in and ends when it is released.
With 4 stroke, the gas flow starts when the trigger switch is pressed in and the wire feed starts
when it is released. The welding process continues until the switch is pressed in again, the wire
feed stops and when the switch is released the post-flow starts. By switching to 4 stroke, it also
turns on the crater filling function. The crater voltage & current can be adjusted on the panel of the
power source.
5.7 Crater filling (Pos 7 & 8)
Crater filling helps to avoid pores, thermal cracking and crater formation in the weld when welding
stops.
The crater voltage & current control on the machine panel controls the full voltage and current
range of the machine. It is generally recommended that the crater voltage & current is set lower
than the welding voltage & current.
5.8 Creep start
Creep start means that the wire is fed at low speed until it comes into electrical contact with the
workpiece and then the speed increases to the set speed. The creep start timing has been preset
and cannot be changed.
5.9 Burnback
Burnback time is a delay between the time when the wire starts to brake until the time when the
power source switches off the welding voltage. The burnback timing has been preset and cannot
be changed.
5.10 Turning on the power source (Pos 13)
Turn on the mains power by turning the mains switch to the “1” position.
If the mains power supply should be interrupted while welding is in progress, and then be restored,
the power source will be energised.
Turn the unit off by turning the switch to the “0” position.
5.11 Connection of welding and return cable
The power source has two outputs, a positive terminal (+) and a negative terminal (-), for
connecting welding and return cables. The output to which the welding cable is connected depends
on the welding method or type of electrode used.
For MIG/MAG/FCAW-S welding, one end of the welding cable can be connected to the positive
terminal (+) or negative terminal (-) depending on the type of electrode used (The connecting
polarity is stated on the electrode packaging) and the other end of the welding cable is connected
to the wire feeder.
Connect the return cable to the other output on the power source. Secure the return cable’s
contact clamp to the work piece and ensure that there is good contact between the work piece and
the output for the return cable on the power source.