Typical Mig Process Control Settings - Miller Bobcat 225 Owner's Manual

14-3. Typical MIG Process Control Settings

NOTE
Material thickness determines weld
parameters.
Wire
Size
.030 in
.035 in
.045 in
Wire speed (amperage) controls weld pe-
netration (wire speed = burn-off rate)
Voltage controls height and width of
weld bead.
OM-4434 Page 60
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.
Wire Size
.035 in
.030 in
.035 in
.045 in
Recommendation
2 in per ampere 2 x 125 A = 250 ipm
1.6 in per ampere 1.6 x 125 A = 200 ipm
1 in per ampere 1 x 125 A = 125 ipm
Low voltage: wire stubs into work
High voltage: arc is unstable (spatter)
Set voltage midway between high/low voltage.
1/8 or
.125 in
Amperage Range
40 − 145 A
50 − 180 A
75 − 250 A
Wire Speed
(Approx.)
Convert Material
Thickness to
Amperage (A)
(.001 in = 1 ampere)
.125 in = 125 A
Select Wire Size
Select Wire Speed
(Amperage)
125 A based on 1/8 in
material thickness
ipm = inch per minute
Select Voltage
Ref. ST-801 865