Steel And Stainless Synergic Gmaw-P (Pulsed Mig) Welding; Ultimarc - Lincoln Electric POWER FEED 25M Operator's Manual

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POWER FEED 25M & 25M ALUMINUM

STEEL AND STAINLESS SYNERGIC GMAW-P (PULSED MIG) WELDING

Synergic GMAW-P (Pulsed MIG) welding is ideal for low spatter, out of position and reduced heat input applications.
welding, the welding current continuously switches from a low level to a high level and then back again. Each pulse sends a small
droplet of molten metal from the wire to the weld puddle.
Pulse welding controls the arc length with 'Trim' instead of voltage. When trim (arc length) is adjusted, the Power Wave automatically
recalculates the voltage, current and time of each part of the pulse waveform for the best result. Trim adjusts the arc length and
ranges from 0.50 to 1.50. Increasing the trim value increases the arc length, while decreasing the trim value decreases the arc length.

ULTIMARC*

For steel and stainless pulse modes, UltimArc regulates the focus or shape of the arc. UltimArc values greater than 0.0 increase the
pulse frequency while decreasing the background current, resulting in a tight, stiff arc best for high speed sheet metal welding.
UltimArc values less than 0.0 decrease the pulse frequency while increasing the background current, for a soft arc good for out-of-
position welding.
*Wave Control in Power Wave
®
355 and 455 machines.
FIGURE B.6
FIGURE B.7
B-10
OPERATION
During pulse