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10.
wire burns into the contact
11.
binding defects
12.
too much spattering during welding
13.
no or insufficient penetration
14.
irregular wire speed / wire speed not
constant
a)
wire speed too low
b)
resistance in the gun liner
c)
wire reel too tightened
d)
resistance in the contact tip
e)
welding voltage too high
f)
arc length too short
g)
pressure on the driving wheel too low
a)
the molten poll flows ahead
a)
welding voltage too low
b)
nozzle obstructed
c)
gun too far from the work piece
d)
dirt on the work piece
e)
insufficient gas flow
f)
wire speed too high
a)
wrong protection gas
b)
welding current too low
c)
wrong polarity
a)
wire reel is too tight or to loose
b)
problem with welding torch
c)
control defective
a)
increase speed
b)
check the liner and replace if necessary
c)
release the brake
d)
replace contact tip
e)
reduce the welding voltage
f)
keep the gun torch farther from work piece
g)
increase pressure
a)
increase the welding speed
a)
increase welding voltage
b)
clean nozzle
c)
keep the gun closer to the work piece
d)
clean work piece
e)
increase gas flow
f)
reduce wire speed
a)
check gas cylinder and if necessary use
another cylinder
b)
increase welding current by increasing
welding voltage and wire speed
c)
check the cables: the ground cable has to
be connected to the negative terminal and
the welding gun to the positive terminal
a)
readjust the wire reel brake
b)
the welding torch has to be blown through
regularly. The torch liner and the drive
wheels must correspond with the type and
diameter of wire
c)
contact Lastek service
Lastimig 550-750th/t0719-rev c0628/nfe/rc - 37
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