8-2. 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.
Material thickness determines weld |
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parameters. | 1/8 or | Convert Material |
| .125 in | |
| Thickness to | |
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| Amperage (A) |
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| (.001 in = 1 ampere) |
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| .125 in = 125 A |
.035 in
Wire Size | Amperage Range | ||
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.023 in |
| 30 − 90 A | |
.030 in |
| 40 − 145 A | |
.035 in |
| 50 − 180 A | |
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Select Wire Size
| Wire | Recommendation |
| Wire Speed | ||
| Size |
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| .023 in | 3.5 in per ampere | 3.5 x 125 A = 437 ipm | |||
| .030 in | 2 in per ampere | 2 x 125 A = 250 ipm | |||
| .035 in | 1.6 in per ampere | 1.6 x 125 A = 200 ipm | |||
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Select Wire Speed (Amperage)
125 A based on 1/8 in material thickness
ipm = inch per minute
Low voltage: wire stubs into work
High voltage: arc is unstable (spatter)
Set voltage midway between high/low voltage.
Select Voltage
Voltage controls height and | Wire speed (amperage) controls weld | |||
width of weld bead. | penetration (wire speed = | |||
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