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Clean the dusty by air compresspor,especially work in polluted air ,you should clean at 
least one time every day. 
The compressed air should well adjusted and according to requirements, avoid small parts 
inside  broken.  

Check the electricity and gas connection, make sure it is well fixed. if some parts i
s oxidized, pls grind these parts and connect again.

 

Avoid wet in inside of machine. If any water  inside, shall test the insulation by 
megameter,continue to  use when it is acceptable. 

   If the machine cant work for a long time, you should packed the machine and locate it in 

dry environment. 

 
    Workers should clear  the dusty  of motor on the feeder and paint oil on feeder roller ,after feeder 

works every 300 hours . 

 

 

 

 

 

 

CAUTION: make sure the electricity is cut off when doing 

maintain work ,make sure the power plug is pulled out 

before open the shell. 

 

 

Summary of Contents for NBC-250

Page 1: ...USER S MANUAL NBC 250 MIG MMA TIG WELDING MACHINE ...

Page 2: ...side can control short circuit in the welding process compared with silicon control welding machine the outgood welding features is as following stable feeder speed light energy saving without noise Little current can also works stable more suitable for welding thin workpiece of low carbon steel alloy stainless steel Also can balance when the voltage is not stable with little spatter deep penetrat...

Page 3: ...onnector on the panel 3 install the welding wire to the bracket 4 choose the suitable gloove according to the wire diameter 5 insert the wire to the feeder through gose pls take care to avoid wire bend 6 the wire should installed deasil and use the scew to fix the wire If the wire is bend pls cut off this part 7 connect the torch to the socket on the panel and connect the wire to the torch Operati...

Page 4: ...tage compensate circuit can ensure the welding current keeps in standard scope If the voltage is exceed the machine may burned so the user should notice it and avoid it 4 If the duty cycle is exceed the welding machine may self protected and stop work it means the duty cycle is exceed over heat protection works so the machine stop working and the red light on the panel is on In such case you don t...

Page 5: ...ind these parts and connect again Avoid wet in inside of machine If any water inside shall test the insulation by megameter continue to use when it is acceptable If the machine cant work for a long time you should packed the machine and locate it in dry environment Workers should clear the dusty of motor on the feeder and paint oil on feeder roller after feeder works every 300 hours CAUTION make s...

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