LOKERMANN GRAND MIG 351 MULTI SYN, Руководство пользователя

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3.6
Welding
trouble
shooting
3.6.1
MIG
welding
trouble
shooting
The following chart addresses some of the common problems of MIG welding. In all cases of equipment
malfunction, the manufacturer’s recommendations should be strictly adhered to and followed.
NO. Trouble Possible Reason Suggested Remedy
1
Excessive
Spatter
Wire feed speed set too high Select lower wire feed speed
Voltage too high Select a lower voltage setting
Wrong polarity set
select the correct polarity for the
wire being used - see machine
setup guide
Stick out too long Bring the torch closer to the work
Contaminated base metal
Remove materials like paint,
grease, oil, and dirt, including
mill scale from base metal
Contaminated mig wire
Use clean dry rust free wire. Do
not lubricate the wire with oil,
grease etc
Inadequate gas flow or too much
gas flow
Check the gas is connected, check
hoses, gas valve and torch are not
restricted. Set the gas flow
between 6-12 l/min flow rate.
Check hoses and fittings for
holes, leaks Protect the welding
zone from wind and drafts
2
Porosity - small
cavities or holes
resulting from
gas pockets in
weld metal.
Wrong gas
Check that the correct gas is
being used
Inadequate gas flow or too much
gas flow
Check the gas is connected, check
hoses, gas valve and torch are not
restricted. Set the gas flow
between 10 - 15 l/min flow rate.
Check hoses and fittings for
holes, leaks e tc .Protect the
welding zone from wind and
drafts
Moisture on the base metal
Remove all moisture from base
metal before welding
Contaminated base metal
Remove materials like paint,
grease, oil, and dirt, including
mill scale from base metal
Contaminated mig wire
Use clean dry rust free wire. Do
not lubricate the wire with oil,
grease etc
Gas nozzle clogged with spatter,
worn or out of shape
Clean or replace the gas nozzle