Awelco MIG ONE - Инструкция по эксплуатации - Страница 7

· 

Very thick or wide welding 

Can be caused by moving the torch too slowly.  

· 

Wire burns back 

It can be caused by wire feed slipping, loose or damaged 
welding tip, poor wire, nozzle held too close to work or 
voltage too high.  

· Little 

penetration 

It can be caused by moving torch too fast, too low voltage 
setting or incorrect feed setting, reversed polarity, insufficient 
blunting and distance between  strips. Take care of 
operational parameters adjustment and improve the 
preparation of the workpieces.  

· Workpiece’s 

piercing 

It may be caused by moving the welding torch too slow, too 
high welding power or by an invalid wire feeding.  

· 

Heavy spatter and porosity 

It can be caused by nozzle too far from work, dirt on work or 
by low gas flow. You have to the two parameters, remeber 
that gas has not to be lower than 7-8 liters/ min. and that the 
current of welding is appropriated to the wire you are using. It 
is advisable to have a pressure reducer of input and output. 
On the manometer you can read the range expressed in liter.  

·  

Welding arc instability 

It may be caused by an insufficient welding voltage, irregular 
wire feed, insufficient protective welding gas.  

DESCRIPTION OF SIGNS AND SYMBOLS 
 

1 ~

Single phase alternating 
voltage 

3 ~

Three phase alternating 
voltage 

U 

0

 … (V) 

Nominal open circuit 
voltage 

Transformer-rectifier 

EN 60974-1 

Norm of reference 

Flat characteristic 

MIG-MAG wire feed 
welding 

U 

1

 … (V/Hz) 

Nominal values of mains 
voltage and frequency 

I 

2

 … (A) 

Welding current 

I 

1 max 

    (A) 

The welding unit's 
maximum absorbed 
current 

I 

1 eff

 … (A) 

Effective current supplied 

X 

Duty cycle 

IP21 

The welding unit's 
protection class 

H 

The transformer's 
insulation class. 

Welding machine suitable 
for use in environments 
with heightened risk of 
electric shock. 

Symbols referring to safety 
regulations 

FAULT FINDING 

FAULT 

Wire isn’t conveyed when 
Feed roll is turning 
 
 
 
 
 

Wire feeding in jerk or 
erratic way 
 
 
 
 
 

No arc 
 
 
 
 

Porous welding seams 
 
 
 
 
 

 
 
 
 
 
 
The machine suddenly stops welding 
operations after an extended and heavy 
duty use 

REASON 

1)  Dirt in liner and/or contact tip 

2)  The frition brake in the hub 

is too tightened 
 

3) 

Faulty welding torch 

1)  Contact tip defect 

2)  Burns in contact tip 

3)  Dirt in feed roll groove 

4) 

Feed roll’s groove worn 

1)  Bad concat between earth clamp 

and workpiece 
 

2)  Short-circuit between contact tip 

and gas shroud 

1)  Failre of gas shield owing to 

spatters in gas shro 
 

2) 

Wrong welding torch distance 

and/or inclination from workpiece 
 

3)  Too small gas flux 

4) Humid 

workpieces 

5) Heavily 

rusted 

workpieces 

1)  Welding machine overheated due 

to an excessive use in stated duty 
cycle 

REMEDY 

Blow with compressed air, replace contact 
tip 
 
Loosen 
 
Check sheating of torchès 
wire guide  

Replace 
 
Replace 
 
Clean 
 
Replace 

Tighten earth clamp and check connections 
 
 
Clean, replace tip and/or shroud as 
necessary 

Clean gas shroud from spatters 
 
 
The length of stick out wire from tip must 
be 5 – 10mm. Inclination not less than 60 
degrees in relation to woekpiece 

Increase flux of welding gas 
 
Dry with heat producer 
 
Clean workpieces from rust 
 
Don’t switch off the machine, let it cool 
down for about 20/30 minutes