HUGONG INVERMIG 350III, Руководство пользователя, Страница: 17 / 24

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needs cleaning once or even twice every quarter if the dust accumulation problem is serious.
* Regularly check the input & output cables of welder to guarantee them right and firmly connected and
avoid them being exposed. Check should be taken once every month when fixed using and every check
taken when removing.
* Regularly check the seal performance of gas system, whether the fan and feeder motor having
abmodeal sound and whether every joint being loose.
* Keep torch cable direct when welding.
* Regularly clean the splash of nozzle (cannot use the way similar to knocking the torch head) and stick
to using splash ointment. Don’t remove the feeder device by means of pulling the torch cable.
* Use qualified wire, no using inferior or rusty wire.
* Clean the dust of liner with compressed air after the welder using some time (the dust is accumulated
by friction between wire and liner) to assure of even wire feeding.
* Please replace the feed roll if find it wear and tear to prevent wire uneven feeding. The pressed roll can
not be pressed too firm to guarantee smooth wire feeding. (It will lead to wire deformation, adding the
feeding resistance and accelerating the friction of gear if pressed over firmly.)
ATTENTION:
* The welder voltage is always higher, so the safety precaution should be taken before repair to
avoid Accidental shock. Under no circumstance can anyone except the professionally trained personnel
open the case of the machine.
* Switch off the power source each time when removing dust.
* No touching inside cable or work piece while removing dust.
Trouble Shooting
* The defects of welding bead
Welding
bead
defects
Reason Solution
Air hole
There is too much oil, rust or water on wire or work-piece
Clean the wire and
work-piece
Poor CO2 gas protection(less gas flow, gas is not pure,
nozzles is blocked, gas leakage, too much wind
Improve the gas
connection
The silicon and manganese in wire is not enough Change to suitable wire
Crack
The current and voltage doesn’t match Adjust the welding data
too much water in the gas change the gas flow
there is too much oil, rust and water on wire or work-piece
clean the wire and work
piece
Under cut
arc length is too small, and welding speed is too fast
increase the arc length
and slow the welding
speed
torch location is not good and welding current is too small
adjust the torch
location, and increase
the welding current