Miller Electric OM-230 - Manual (Page 41)

OM-230 693 Page 37
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.
1/8 or
.125 in
Material thickness determines weld
parameters.
Convert Material
(.001 in = 1 ampere)
.125 in = 125 A
Select Wire Size
Wire Size Amperage Range
.030 in
.035 in
.023 in
40 − 145 A
50 − 180 A
30 − 90 A
.035 in
Select Wire Speed
Select Voltage
Wire
Recommendation
.030 in
.035 in
.023 in
2 in per ampere
1.6 in per ampere
3.5 in per ampere
Wire Speed
2 x 125 A = 250 ipm
1.6 x 125 A = 200 ipm
3.5 x 125 A = 437 ipm
Set voltage midway between high/low voltage.
Low voltage: wire stubs into work
High voltage: arc is unstable (spatter)
125 A based on 1/8 in
Thickness to
(Amperage)
material thickness
Size (Approx.)
Amperage (A)
ipm = inch per minute
Voltage controls height and
width of weld bead. Wire speed (amperage) controls weld
penetration (wire speed = burn-off rate)