Gas Test; Adjusting The Gas Post-Flow Time; Setting The Shielding Gas Quantity - EWM Taurus 505 VRD Basic TDM Operating Instructions Manual

5.8.1

Gas test

• Slowly open the gas cylinder valve.
• Open the pressure regulator.
• 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 regulator.
• The gas test is triggered on the machine control by pressing the
Shielding gas flows for around 25 seconds or until the button is pressed again.
5.8.2

Adjusting the gas post-flow time

5.8.3

Setting the shielding gas quantity

Welding process
MAG welding
MIG brazing
MIG welding (aluminium)
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
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!
099-005261-EW501
11.04.2012
m /m in
Figure 5-7
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)
Factor
1.14
1.35
1.75
3.16
NOTE
Design and function
Shielding gas supply
button briefly.
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