Maintenance / Location Of Errors / Trouble Shooting - Migatronic MIG 305 Serie Betriebsanleitung

MAINTENANCE
Lack of maintenance can lead to reduced reliability
and repeal of the guarantee.
Wire feed unit
This unit must be cleaned with dry, clean, compressed
air and maintained regularly at the wire feed roll and
the capillary tubes, as it is of great importance for a
satisfactory welding result and a minimum of wear and
tear that the wire passes through the wire drive system
without any deformations of the wire or the wire feed
roll. The contact tips must be checked often and
changed if the copper plating of the wire is damaged
on its way through the tips. Copper dust may prevent
free passage of wire through the torch liner. A weekly
control and cleaning of the capillary tubes and the wire
feed roll is recommended.
MIG/MAG hose
Great care should be taken to ensure that the welding
hose is not overloaded. It should not be pulled over
sharp edges, and heavy machines should not run over
it. The hose should be dismantled every week and
blown out with clean, dry compressed air. The torch
should be disconnected during this process.
MIG/MAG welding torch
There are many parts in the welding torch that have to
be cleaned regularly. The main ones are the contact
tips and the gas shroud. During the welding process,
these parts are bombarded with spatter that sticks in
the shroud. Spatter should be removed regularly. Add
MIG-spray that loosens spatter. During the cleaning
process, the gas shroud should be removed. Do not
clean by banging or hitting the torch.
Power source
With regular intervals dust should be blown out of the
power source with clean, dry compressed air. Choked
or blocked air intake and outlet may result in
overheating. The power source should be checked
and cleaned at least once a year by trained service
staff.
Cooling unit
Waterlevel should be checked regularly. To ensure
reliable operation, always use Migatronic cooling liquid
of type propan-2-ol in the ratio 23% propan-2-ol and
77% demineralized water, which provides an anti-
freeze solution up to –9°C (part no. 99290510). If the
water pump sends out a snarling sound, then extra
coolant should be added, using the filling nozzle.
Coolant needs yearly renewal.
LOCATION OF ERRORS
One error situation is registered that is Machine over-
heating error. The error is shown for as long as it
exists.
Machine overheat error
Origin: Overheating of the machine due to
incorrect use, e.g. exceeding the duty
cycle of the machine for the welding
current in use.
Consequence: The welding process is interrupted
and post-flow starts. The LED with the
symbol for overheat is lit. Fan runs.
Remedy: If the error is not caused by incorrect
use, Migatronic's Service Department
has to be called in.
TROUBLE SHOOTING
The wire feed has stopped
1. The inlet nozzle and the wire are not in alignment
with each other.
2. The reel of wire is too taut, the wire must come off
the reel evenly.
3. The inlet tube or contact tip is badly worn or is
blocked up.
4. The welding wire is not clean or it is rusty. It could
also be of an inferior quality.
5. The pressure roller has to be tightened.
Spatter
1. The wire feed is too fast for the voltage setting.
2. Worn out contact tip.
Porous weld. A cone is formed when spot welding.
1. Contact tip is blocked up
2. A leak in the gas hose draws in air which mixes
with the shielding gas.
The wire keeps sticking in the contact tip and
feeds very slowly
1. Any damaged wire should be cut off, pulled out
and replaced. The pressure on the wire feed roller
should be checked and adjusted if necessary.
2. Worn out contact tip.
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