Design and function
Shielding gas supply
26
099-008717-EW501
24.03.2011
5.10
Shielding gas supply
5.10.1
Gas test
• Slowly open the gas cylinder valve.
• Open the pressure reducer.
• Switch on the power source at the main switch.
• Initiate gas test function on the machine control.
• Set the relevant gas quantity for the application on the pressure reducer.
• The gas test is triggered on the machine control by pressing the
button briefly.
Shielding gas flows for around 25 seconds or until the button is pressed again.
5.10.2
“Rinse tube package” function
Operating
Element
Action
Result
5 s
Select rinse tube package.
Shielding gas flows continuously until the Gas Test button is pressed
again.
5.10.3
Setting the shielding gas quantity
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
NOTE
Incorrect shielding gas setting!
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!
