Lincoln Electric POWER MIG IM736-D - Manual (Page 24)

B-12 B-12 OPERATION
POWER MIG 300
POWER MODE ™
The Power Mode ™ process was developed by
Lincoln to maintain a stable and smooth arc at low
procedure settings which are needed to weld thin
metal without pop-outs or burning-through. For
Aluminum welding, it provides excellent control and
the ability to maintain constant arc length. This results
in improved welding performance in two primary types
of applications.
• Short Arc MIG at low procedure settings.
• Aluminum MIG welding.
Power Mode ™ is a method of high speed regulation
of the output power whenever an arc is established. It
provides a fast response to changes in the arc. The
higher the Power Mode Setting, the longer the arc. If a
welding procedure is not established, the best way to
determine the Power Mode Setting is by experimenta-
tion until the desired output result is established.
In the Power Mode two variables need to be set:
• Wire Feed Speed
• Power Mode Trim
Setting up a Power Mode procedure is similar to set-
ting a CV MIG procedure. Select a shielding gas
appropriate for a short arc process.
• For steel, use 75/25 Ar/CO
2
shield gas.
• For Stainless, select a Helium blend Tri-Mix.
• For Aluminum, use 100% Ar.
Start by setting the wire feed speed based upon mate-
rial thickness and appropriate travel speed. Then
adjust the Volts/Trim knob as follows:
• For steel, listen for the traditional “ frying egg ”
sound of a good short-arc MIG procedure to know
you have the process set correctly.
• For aluminum, simply adjust the Volts/Trim knob
until the desired arc length is obtained.
Note the Volts/Trim display is simply a relative number
and DOES NOT correspond to voltage.
Some procedure recommendations appear in Table
B.4.
Aluminum 4043 Aluminum 5356 Mild Steel Mild Steel Mild Steel Mild Steel Mild Steel Mild Steel Stainless Steel Stainless Steel
E4043 E5356 L56 L56 L56 L56 L56 L56 E308L E308L
0.035 0.035 0.025 0.025 0.030 0.030 0.035 0.035 0.030 0.035
100% Ar. 100% Ar. 100% CO
2
75/25 Ar/CO
2
100% CO
2
75/25 Ar/CO
2
100% CO
2
75/25 Ar/CO
2
Tri-mix Tri-mix
22 ga.
Not Recommended 100 / 0.8 Not Recommended 90 / 1.0
20 ga. 120 / 1.0 120 / 1.0 100 / 0.7 100 /1.0 80 / 1.5 50 / 0.5
18 ga. 140 / 1.7 140 / 1.5 110 / 1.5 110 / 1.5 100 / 2.5 100 / 2.5 110 / 2.0 110 / 2.0
16 ga. 190 / 2.0 190 / 2.0 125 / 2.0 125 / 2.0 125 / 3.0 125 / 3.0 140 / 2.5 130 / 2.7
14 ga. 400 / 2.0 400 / 2.5 260 / 3.0 260 / 3.0 160 / 2.3 160 / 2.3 160 / 3.8 160 / 3.5 210 / 3.0 190 / 3.5
12 ga. 330 / 5.0 330 / 4.5 230 / 3.5 230 / 3.5 200 / 5.0 200 / 4.5 270 / 5.0 230 / 6.0
10 ga. 500 / 7.0 500 / 7.0 300 / 6.0 300 / 6.0 240 / 6.5 240 / 7.0 325 / 6.5 300 / 7.0
3/16 570 / 9.0 600 / 7.8 400 / 7.5 400 / 7.0
1/4 700 / 9.1 700 / 8.5
MATERIAL THICKNESS
WFS / POWER MODE SETTING
COMMENTS
Not
Recommended
below 400
WFS
MATERIAL
WIRE
WIRE SIZE
GAS
Not
Recommended
below 400
WFS
Recommended Welding Procedures for Power Mode - Table B.4