Design and function
MIG/MAG welding
50
099-005266-EW501
07.05.2014
Interval
Figure 5-20
Start
•
Press and hold torch trigger.
•
Shielding gas is expelled (gas pre-flows).
Sequence
•
Arc ignites after the wire electrode makes contact with the workpiece at creep speed.
•
Welding current flows.
•
Wire feed speed increases to the set nominal value.
•
The wire feed stops after the spot time elapses.
•
Arc is extinguished after the wire burn-back time elapses.
•
The process is repeated when the pause time is over.
End
•
Release torch trigger, wire feed stops, arc is extinguished, gas post-flow time elapses.
If the pause time is less than 3 s, wire creep only takes place in the first spot phase.
When the torch trigger is released, the welding process is also ended even before the spot time elapses.