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W A V E F O R M
C O N T R O L
Tandem MIG
High-Speed and High-Deposition Welding
Comparing High-Speed Tandem MIG
To Single Wire GMAW Processes
Travel Speed Comparison
140
120
100
Travel
Speed
80
(ipm)
60
40
Comparing High-Deposition Tandem MIG
To Single Wire GMAW Process
Higher Deposition rates
Problem - Single Wire GMAW
A conventional single wire GMAW process has an
optimum operating range based primarily on wire
diameter, shielding gas and wire feed speed.
Attempting to maximize deposition rates for a given
wire diameter requires increasing the wire feed rate
to the top or beyond its defined operating range. As
the process is pushed to its limit, arc instability is often
a result. Arc instability creates increased spatter levels
and weld porosity. The elevated welding currents
create weld pool turbulence that can cause root
porosity, or porosity just below the surface of the
weld bead.
Solution - Tandem MIG
The two-wire electrode configuration of the Tandem
MIG process allows a higher total wire feed rate,
creating a higher deposition rate. Each electrode in
the Tandem configuration can be operated within an
optimum operating range as defined by a single wire
T
h
e
f
u
t
T E C H N O L O G Y
Typical Travel Speeds
Single Wire GMAW vs Tandem MIG
2mm
2.5mm
u
r
e
o
f
T M
3mm
4mm
Lap Weld Size
process. Both the lead and the trail electrode may be
operated in a stable operating range, while the
combined wire feed speed of the two electrodes often
exceed a useable single wire process by 35-80%.
w
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l
d
i
n
APPLICATION
Single Wire GMAW
Tandem MIG
5mm
g
i
s
h
e
7/16
®
r
e
.
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