Design and function
MIG/MAG functional sequences / operating modes
099-005084-EW501
22.09.2011
39
5.10.2
Non-latched operation
t
I
t
t
1.
2.
Figure 5-13
1st cycle
• Press and hold torch trigger.
• Shielding gas is expelled (gas pre-flows).
• Arc ignites after the wire electrode makes contact with the workpiece.
• Welding current flows.
2nd cycle
• Release torch trigger, wire feed motor stops, arc is extinguished.
5.10.3
Latched operation
t
t
t
I
1.
2.
3.
4.
Figure 5-14
1st cycle
• Press and hold torch trigger.
• Shielding gas is expelled (gas pre-flows).
• Arc ignites after the wire electrode makes contact with the workpiece.
• Welding current flows.
2nd cycle
• Release torch trigger (no effect).
3rd cycle
• Press torch trigger (no effect).
4th cycle
• Release torch trigger, wire feed motor stops, arc is extinguished.
