12
3
3
3... W
W
Wiiirrre
e
e fffe
e
ee
e
ed
d
de
e
errr
4
4
4... C
C
Ca
a
ab
b
bllle
e
es
s
s
P
P
Pa
a
arrrttt
C
C
Ch
h
he
e
ec
c
ck
k
k
R
R
Re
e
em
m
ma
a
arrrk
k
ks
s
s
Pressure
adjusting
handle
1. Check if the pressure-adjusting handle
is fixed and adjusted to the desired
position.
The unfixed pressure-adjusting handle
leads to the unstable welding output.
Wire-feeding
hose
1. Check if there is dust or spatter inside
the hose or beside wire-feeding wheel.
Remove the dust.
2. Check if there is a diameter agreement
of wire and wire-feeding hose.
Non-agreement of the diameter of wire
and wire-feeding hose possibly leads
to the excessive spatter and unstable
arc.
3. Check if rod and wire feeding groove
are concentric.
Unstable arc possibly occurs.
Wire-feeding
wheel
1. Check if there is an agreement of wire
diameter and wire-feeding wheel.
Non-agreement of wire diameter and
wire-feeding wheel possibly leads to
the excessive spatter and unstable arc.
2. Check if the wire groove is blocked.
Replace it if necessary.
Pressure
adjusting
wheel
1. Check if the pressure adjusting wheel
can rotate smoothly, and it’s physically
complete.
Unstable
rotation
or
physically
incompleteness of the wheel possibly
leads to unstable wire feeding and arc.
P
P
Pa
a
arrrttt
C
C
Ch
h
he
e
ec
c
ck
k
k
R
R
Re
e
em
m
ma
a
arrrk
k
ks
s
s
Torch cable
1. Check if the cable of torch is twisted.
The
twisted
torch
cable
leads
to
unstable wire feeding and arc.
2. Check if the coupling plug is in loose
connection.
Output cable
1.
Check
if
the
cable
is
physically
complete.
Relevant measures should be taken to
obtain stable weld and prevent the
possible electric shock.
2.
Check if insulation damage or loose
connection exists.
Input cable
1. Check
if
the
cable
is
physically
complete.
2. Check if insulation damage or loose
connection exists.
Earth cable
1. Check if the earth cables are well fixed
and not short-circuited.
Relevant measures should be taken to
prevent the possible electric shock.
2. Check if this welding equipment is well
grounded.
INSTRUCTION MANUAL
·
MIG 250
i
