Functional Characteristics; Shielding Gas Supply (Shielding Gas Cylinder For Welding Machine); Shielding Gas Volume Settings; Gas Test - EWM M3.7X-O Operating Instructions Manual

Functional characteristics

Shielding gas supply (shielding gas cylinder for welding machine)

5 Functional characteristics
5.1 Shielding gas supply (shielding gas cylinder for welding machine)
5.1.1

Shielding gas volume settings

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!
• Slowly open the gas cylinder valve.
• Open the pressure regulator.
• Switch on the power source at the main switch.
• Trigger gas test > see 5.1.1.1 chapter function (welding voltage and wire f eed motor remain switched
of f – no accidental arc ignition).
• Set the relevant gas quantity for the application on the pressure regulator.
Setting instructions
Welding process
MAG welding
MIG brazing
MIG welding (aluminium)
TIG
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
75% Ar/25% He
50% Ar/50% He
25% Ar/75% He
100% He
5.1.1.1

Gas test

24
Recommended shielding gas quantity
Wire diameter x 11.5 = l/min
Wire diameter x 11.5 = l/min
Wire diameter x 13.5 = l/min (100 % argon)
Gas nozzle diameter in mm corresponds to l/min gas throughput
Factor
1.14
1.35
1.75
3.16
Figure 5-1
20s
099-5TLPXQ-EW501
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15.12.2022