Typical Mig Process Control Settings - Miller Electric Millermatic 212 Auto-Set Owner's Manual

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
parameters.
Wire
Size
0.023 in.
0.030 in.
0.035 in.
Voltage controls height and
width of weld bead.
Wire Size
.035 in
0.023 in.
0.030 in.
0.035 in.
Recommendation
3.5 in. per ampere 3.5 x 125 A = 437 ipm
2 in. per ampere
1.6 in. per ampere 1.6 x 125 A = 200 ipm
Low voltage: wire stubs into work
High voltage: arc is unstable (spatter)
Set voltage midway between high/low voltage
1/8 or 0.125 in.
Amperage Range
30 − 90 A
40 − 145 A
50 − 180 A
Wire Speed
(Approx.)
2 x 125 A = 250 ipm
Wire speed (amperage) controls weld
penetration (wire speed = burn-off rate)
Convert Material
Thickness to
Amperage (A)
(0.001 in. = 1 ampere)
0.125 in. = 125 A
Select Wire Size
Select Wire Speed
(Amperage)
125 A based on 1/8 in.
material thickness
ipm = inches per minute
Select Voltage
OM-238 118 Page 35