Functional characteristics
MIG/MAG welding
26
099-M183xA-EW501
15.7.2022
Interval
Figure 5-12
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.
5.2.6
Program sequence
Certain materials require additional programs for reliable, high-quality welding. In addition to the main pro-
gram P
A
(continuous welding), a start program P
START
(prevention of cold welds at the start of the seam)
and an end program P
END
(prevention of end-craters through targeted heat reduction) are used.
By entering a start time
and / or end current time
, the special operating modes (non-latched or
latched special) are activated. Corresponding slope times can also be defined.
The relevant parameters are set in the Expert menu
> see 5.2.7 chapter
.
Figure 5-13
Display
Setting/selection
P
START
Start program
