Migatronic OMEGA2 CoWelder 300 Guía De Usuario página 10

Connection and start-up
Connection of shielding gas
Connect the gas hose, which branches off from the back
panel of the welding machine (3), to a gas supply with
pressure regulator (2-6 bar). (Note: Some types of pressure
regulators require an output pressure of more than 2 bar to
function optimally).
One gas cylinder can be mounted on the bottle carrier on
the back of a trolley if any.
Gas consumption
Depending on the welding task, gas type and seam design,
the gas consumption will vary in ranges from 6-7 l/min at low
amperages (<25A) and up to 27 l/min at max. amperage.
Material consumption
Material consumption can be estimated by calculating weld-
ing time in minutes times wire feed speed (m/min) times
weight per meter of the welding consumables in use.
Adjustment of wire brake
The wire brake must ensure that the wire reel brakes suf-
ficiently before the welding wire runs over the edge of the
reel. The brake force is dependent on the weight of the wire
reel and wire feed speed. Factory setting is 15kg.
Adjustment:
• Dismount the control knob
by placing a thin screw
driver behind the knob and
thereafter pull it out.
• Adjust the wire brake by
fastening or loosening the
self-locking nut on the axle
of the wire hub.
• Remount the control knob.
Assembly of parts in wire feed unit
Lifting instructions
The OMEGA trolley with four wheels
2
cannot be lifted with a crane but only
manually using the handle.
The machine must not be lifted with a
mounted gas cylinder!
Inching
The function is used for wire inching e.g.
after change of wire.
Selecting welding polarity
Polarity reversal is recommended for certain types of welding
wire, in particular Innershield welding wire. For recommended
polarity, please refer to the welding wire packaging.
Change of polarity:
1. Disconnect the machine from the
mains supply.
2. Dismount screws in the wire
chamber with a wrench (picture
1).
3. Exchange brass plate from plus to
minus (picture 1).
4. Mount screws in the wire chamber
with a wrench (picture 1).
5. Exchange earth cable from minus
to plus (picture 2).
6. Connect the machine to the mains
supply.
x4
10
1
2
The pressure of the
thumbscrew is adjusted to
allow the wire feed roll
just to slide on the wire
when this is stopped at
the contact tip