Functional Characteristics; Tig Welding; Gas Test - Setting The Shielding Gas Volume - EWM T 4.02 - AC/DC Comfort 2.0 Operating Instructions Manual

Functional characteristics

TIG welding

Functional characteristics
4
4.1 TIG welding
Gas test – setting the shielding gas volume
4.1.1
•
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.
•
The gas test can be activated at the machine control by pressing the "Gas test
button > see 3.1.1 chapter.
Setting the shielding gas quantity (gas test)
•
Shielding gas flows for approx. 20 seconds or until the push-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!
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
For connecting the shielding gas supply and handling the shielding gas cylinder refer to the
power source operating instructions.
14
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
"
push-
099-00T402-EW501
24.04.2018