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WARNING: 

while welding and cutting, please protect yourself, it may harm your body and others . 

pls following our instructions:   

Electricity may cause death! 

 

Following operation standard, install the earth setting. 

 

when skin is bare or  workers  wearing wet glove or  wet clothes ,It is forbidden to  touch  
workpiece or electrode with electricity.

 

 

Make sure you  are insulate to  the earth and the workpiece .

 

 

make sure your working location is safe

 . 

Arc 

may harm your eye and burn your skin! 

 

Wearing suitable clothes and mask,glass, to protect your eye. 

 

Use suitable mask and blind to protect the person nearby. 

 

 Welding may cause fire, so please make sure workplace nearby is without any tinder. 

 
 
 

  

 

 

 

 

 

 

 

 

 

This welding machine is based on advanced inverter technology, installed special reactor inside,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 penetration 
and high duty cycle.  

 

Installation: 

Euiped with voltage compensate system ,so the machine can work normally when the actual voltage 
is 

±

15

  than rated voltage.   

In order to avoid voltage reducing,it  is suggested to use bigger dimension cable when using longer cable.and 
if the connecting cable is too long, it may affact arc striking and other performance.so we suggest you 
use the  suitable  length as we recommend.  
make sure the ventilate part is not blocked , or the cooling system may not work. 

 

 

 

 

 

CAUTION! 

  

            USE THIS MACHINE SHOULD INSTALL ELECTRICITY LEAK 

PROTECTION SWITCH !

  

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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