Design and function
MIG/MAG welding
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099-005607-EW501
20.11.2020
5.2.3 Setting the shielding gas volume (gas test)/rinse hose package
• Shielding gas supply as described in chapter Transport and positioning
> see 5.1.9 chapter
.
• Slowly open the gas cylinder valve.
• Open the pressure regulator.
• Switch on the power source at the main switch.
• Set the relevant gas quantity for the application on the pressure regulator.
• You can activate the gas test on the machine control (see Control operating instructions) or by pres-
sing the "Gas test/rinse hose package
"
push-button briefly (welding voltage and wire feed motor
remain switched off – no unintentional ignition of the arc). Some welding systems have several push-
buttons to set the shielding gas. The push-button is generally found near a wire feeder.
Shielding gas flows for around 25 seconds or until the button is pressed again.
If the shielding gas setting is too low or too high, this can introduce air to the weld pool and may cause
pores to form. Adjust the shielding gas quantity to suit the welding task!
Welding process
Recommended shielding gas quantity
MAG welding
Wire diameter x 11.5 = l/min
MIG brazing
Wire diameter x 11.5 = l/min
MIG welding (aluminium)
Wire diameter x 13.5 = l/min (100 % argon)
Helium-rich gas mixtures require a higher gas volume!
The table below can be used to correct the gas volume calculated where necessary:
Shielding gas
Factor
75% Ar/25% He
1.14
50% Ar/50% He
1.35
25% Ar/75% He
1.75
100% He
3.16
5.2.4 Welding task selection
For selection of the welding task and for general operation see the relevant Control operating instructions.
