Preparing Unit For Synergic Mig (Gmaw And Fcaw) Welding Process - Miller Electric MPi 220P Owner's Manual

5-8. Preparing Unit For Synergic MIG (GMAW And FCAW) Welding Process

4
5
Arc Length Knob
Adjustment
OM-253 918 Page 30
Program Selection
Wire Type
(See Section 5-15)
And Gas
SYN MIG
Workpiece
Thickness
2
Press And Release
1
3
To select MIG welding process,
proceed as follows:
Prepare unit according to Section 4.
Use a cable with correct adapter,
connect gun to the MIG gun con-
nector.
For GMAW process:
Connect wire drive lead to positive
output terminal. Connect work lead
to negative output terminal. See
Section 4-5 for GMAW solid wire
with shielding gas process. See
Section 4-3 for installing gas sup-
ply.
For FCAW process:
Connect wire drive lead to negative
output terminal. Connect work
clamp lead to positive output ter-
minal. See Section 4-5 for FCAW
self-shielding wire no shielding gas
process.
1 Process Selection P1 Push
Button
2 Sequencer Set-Up P2 Push
Button
3 Sequencer
Adjustment/Operator Point
Setting P3 Push Buttons (See
Section 5-16)
4 Workpiece Thickness
Adjustment Knob
Use knob to select desired work-
piece thickness. Rotate knob
clockwise to increase the thickness
value.
5 Arc Length Control Knob
Use knob to select desired arc
length value. It is the distance from
end of wire electrode to the
workpiece. Rotate knob clockwise
to increase the arc length value
(min = −40, max = +40). It allows
setting inductance in MIG mode. In
Pulse mode, this adjustment
changes the arc cone by adjusting
the preprogrammed factory pulse
data.
Set MIG welding process using pro-
cess selection P1 push button. To
enter synergic MIG mode, press
and release sequencer set-up P2
push button. Use sequencer ad-
justment P3 push buttons until
SYN-MIG is displayed. Press and
release P2 again to confirm setting.
.
In Synergic MIG mode, the op-
erator may need to adjust weld-
ing data (wire type, wire dia-
meter and gas type) and only
one weld parameter. Gener-
ally, wire feed speed is adjus-
ted and the synergic process
automatically sets appropriate
weld voltage. Synergic welding
also sets many secondary
welding parameters automatic-
ally for improved weld quality.
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