Section 9 − Gmaw Welding (Mig) Guidelines - Hobart H100S2-10 Owner's Manual

SECTION 9 − GMAW WELDING (MIG) GUIDELINES
9-1. Typical GMAW (MIG) Process Connections
Regulator/
Flowmeter
Shielding Gas
9-2. Typical GMAW (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.
Select Wire Size
Wire Size
.035 in
0.023 in.
0.030 in.
0.035 in.
Select Voltage
Low voltage: wire stubs into work
High voltage: arc is unstable (spatter)
Set voltage midway between high/low voltage
OM-258 267 Page 28
Wire Feeder/
Power Source
Gas
Amperage Range Wire
Size
30 − 90 A
0.023 in.
40 − 145 A
0.030 in.
50 − 180 A
0.035 in.
Voltage controls height and
width of weld bead.
Gun
Work Clamp
1/8 or 0.125 in.
(0.001 in. = 1 ampere)
Select Wire Speed (Amperage)
Wire Speed
Recommendation
(Approx.)
3.5 in. per ampere 3.5 x 125 A = 437 ipm
2 in. per ampere 2 x 125 A = 250 ipm
1.6 in. per ampere 1.6 x 125 A = 200 ipm
Wire speed (amperage) controls weld
penetration (wire speed = burn-off rate)
!
Weld current can damage
electronic parts in vehicles.
Disconnect both battery
cables before welding on a
vehicle. Place work clamp as
close to the weld as possible.
Workpiece
GMAW1 2013−05 (GMAW Only) − Ref. 801 909-A
Convert Material
Thickness to
Amperage (A)
0.125 in. = 125 A
125 A based on 1/8 in.
material thickness
ipm = inches per minute