Peak Current; Background Current; Tailout - Lincoln Electric POWER FEED 25M Operator's Manual

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POWER FEED 25M & 25M ALUMINUM
Peak
Current
Too Low
Background
Current
Too Low

PEAK CURRENT

(Figure B.16)
Peak current controls the arc length, which also affects the
shape of the root. When using 100% CO
be higher than when welding with blended shielded gases. A
longer arc length is required with CO
FIGURE B.16
Peak
Current
Optimum

BACKGROUND CURRENT

Background current adjusts the overall heat input into the weld.
Changing the background current changes the shape of the back
bead. 100% CO requires less background current than when
2
welding with blended shielding gases.
FIGURE B.17
Background
Current
Optimum

TAILOUT

Tailout provides additional heat into the weld without increasing
the arc length or the droplet size. Higher tailout values improve
wetting and may give faster travel speeds.
, the peak current will
2
to reduce spatter.
2
(Figure B.17)
B-18
OPERATION
Peak
Current
Too High
Background
Current
Too High