Migatronic OMEGA2 Guía De Usuario página 13

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Connection and start-up
Adjustment of wire brake
The wire brake must ensure that the wire reel brakes
sufficiently 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.
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.
Torch adjustment (Dialog torch)
The current size/wire feed speed can be adjusted
both from the machine and the welding torch if a
welding hose with dialog torch is in use. The torch
adjustment is passive without Dialog torch.
Inching
The function is used for wire
inching e.g. after change of
wire.
Gouging (only OMEGA
550 Advanced)
2
1. Mount the carbon-arc torch
2. Mount the compressed air hose on the
compressor. Set the pressure between 5 and 7 bar
3. Select program P004. Set the machine at max.
current – not less than 400A
4. Select carbon electrode (6-8 mm)
5. Use protective equipment: ear protection,
welding goggles, gloves etc. Note! Metal sparks
pose fire danger.
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.
OMEGA
C
2
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.
OMEGA
S
2
Change of polarity:
1. Disconnect the machine from the mains supply.
2. Exchange intermediary cable from plus to minus.
3. Exchange earth cable from minus to plus.
4. Connect the machine to the mains supply.
13
1
2
Change of polarity
OMEGA
2
C
2
Change of polarity
OMEGA
S
2

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