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To make best use of the machine, daily checking is very important. During the daily checking, please check in the
order of torch, wire-feeding vehicle, all kinds of PCB, the gas hole, and so on. Remove the dust or replace some
parts if necessary. To maintain the purity of the machine, please use original welding parts.
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Only the qualified technicians are authorized to undertake the repair and check task of this welding
equipment in case of machine fault.
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Control panel
1. Operation, replacement and installation of
Switch.
2. Switch on the power, and check if the power
indicator is on.
Fan
1. Check if the fan is functioning and the sound
generated is normal.
If the fan doesn’t work or the sound is
abnormal, do inner check.
Power supply
1. Switch on the power supply, and check if
abnormal vibration, heating of the case of this
equipment, variation of colors of case or buzz
presents.
Other parts
1. Check if gas connection is available, case and
other joints are in good connection.
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Nozzle
1. Check if the nozzle is fixed firmly
and distortion of the tip exists.
Possible gas leakage occurs due to the unfixed nozzle.
2. Check if there is spatter sticking
on the nozzle.
Spatter possibly leads to the damage of torch. Use anti-
spatter to eliminate the spatter.
Contact tip
1.
Check if the contact tip is fixed
firmly.
Unfixed contract tip possibly leads to the damage of
torch.
2.
Check if the contact tip is
physically complete.
The physically incomplete contact tip possibly leads to
the unstable arc and arc automatically terminating.
Wire feeding
tube
1. Measure length of wire feed
tube stretching out.
The length of the wire feed tub stretching out should be
long enough to contact the contact tip. Replace it if less
than 6mm, otherwise unstable arc possibly occurs.
2. Make sure that there is the
agreement of wire and wire feed
tube.
Disagreement of the diameters of wire and wire feed
tube possibly leads to the unstable arc. Replace it/them
if necessary.
3. Make sure that there is no
bending or elongation of wire
feed tube.
Bending and elongation of wire feed tube possibly leads
to the unstable wire feed and arc. Replace it if
necessary.
4. Make sure that there is no dust
or spatter accumulated inside
the wire feed tube, which makes
the wire feed tub blocked.
If there is dust or spatter, remove it.
5. Check if the wire feed tube and
O-shaped seal ring
are
physically complete.
The Physically incomplete wire feed tube or O-shaped
seal ring possibly leads to the excessive spatter.
Replace the wire feed tube or O-shaped seal ring if
necessary.
Diffuser
1. Make sure that the diffuser
of required specification is
installed and is unblocked.
Defection weld or even the damage of torch
occurs due to the non-installation of diffuser or
the unqualified diffuser.
INSTRUCTION MANUAL
·
MIG 250
i