Functional characteristics
Gas test – setting the shielding gas volume
099-M183xB-EW501
18.7.2022
17
5
Functional characteristics
5.1
Gas test – setting the shielding gas volume
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.
• Set the relevant gas quantity for the application on the pressure regulator.
• Press the push-button “gas test / flush” to activate the gas test
> see 4 chapter
.
Shielding gas flows for around 25 seconds or until the button is pressed again.
Repeat rinsing process several times.
Setting instructions
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)
TIG
Gas nozzle diameter in mm corresponds to l/min gas throughput
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
MIG/MAG welding
5.2.1
Definition of MIG/MAG welding tasks
This machine range features simple operation with a very wide range of functions.
• JOBs (welding tasks consisting of welding process, type of material, wire diameter and type of shield-
ing gas) are pre-defined for all common welding tasks.
• Simple JOB selection from a list of pre-defined JOBs (sticker on the machine).
• The required process parameters are calculated by the system depending on the operating point
specified (single-dial operation via wire speed rotary dial).
• Conventional welding task definition using wire speed and welding voltage is also possible.
The welding task definition described below applies when defining MIG/MAG and cored wire weld-
ing tasks.
Pay attention to the signal light for the polarity setting!
It may be necessary to change the welding current polarity depending on the JOB selected or the
welding process.
• Reconnect the polarity selction plug if necessary.
