12-2. Typical MIG Process Control Settings
.These settings are guidelines only. Material and wire type, joint design, fitup, position, shielding gas, etc. affect settings. Test welds to be sure
they comply to specifications.
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1 | 1/8 or | |||||
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| .125 in |
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4
.These settings are guidelines only. Material
and wire type, joint design, fitup, position, shielding gas, etc. affect settings. Test welds to be sure they comply to specifications.
1Convert Material Thickness to Amperage (A)
(.001 in = 1 ampere)
.125 = 125 A
.Material thickness determines weld parameters.
2 Select Wire Size
Wire Size | Amperage Range |
.030 in | 40 − 145 A |
.035 in | 50 − 180 A |
.045 in | 75 − 250 A |
3 Select Wire Speed (Amperage)
125 A based on 1/8 in (3 mm) material thickness. (ipm = inch per minute)
Wire | Suggested | Wire Speed | |
Size | (Approx.) | ||
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.030 in | 2 in per amp | 2 x 125 A = 250 ipm | |
.035 in | 1.6 in per amp | 1.6 x 125 A = 200 ipm | |
.045 in | 1 in per amp | 1 x 125 A = 125 ipm | |
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.Wire speed (amperage) controls weld pene- tration (wire speed =
4 Select Voltage
Low Voltage: wire stubs into work
High Voltage: arc is unstable (spatter)
Set voltage midway between high/low voltage.
.Voltage controls height and width of weld bead.
804 476 / 229 573
