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Design and function
MIG/MAG welding
099-005507-EW501
13.09.2018
45
Special, non-latched
Figure 5-33
Step 1
• Press and hold torch trigger
• Shielding gas is expelled (gas pre-flows)
• Wire feed motor runs at “creep speed”.
• Arc ignites after
the wire electrode makes contact with the workpiece, welding current is flowing (start
program P
START
for the time t
start
)
• Slope to main program P
A
.
Step 2
• Release torch trigger
• Slope to end program P
END
for the time t
end
.
• WF motor stops.
• Arc is extinguished after the preselected wire burn-back time expires.
• Gas post-flow time elapses.