31
INSTALLATION & OPERATION
2
(4) Snip the wire carefully, be sure to hold
the wire to prevent the spool uncoiling.
Carefully feed the wire into the inlet guide
tube of the wire feed unit.
(3) Fit the wire spool onto the spool holder
fitting the locating pin into the location
hole on the spool. Replace the spool
retaining nut tightly.
(5) Feed the wire through the drive roller
and into the outlet guide tube of the wire
feeder.
(6) Lock down the top pressure roller and
apply a medium amount of pressure using
the tension adjustment knob.
(7) Check that the wire passes through the
center of the outlet guide tube without touching
the sides. Loosen the locking screw and then
loosen the outlet guide tube retaining nut too
make adjustment if required. Carefully retighten
the locking nut and screw to hold the new
position.
5.
Feed the wire through the drive roller and
into the outlet guide tube of the wire feeder.
6.
Lock down the top pressure roller and
apply a medium amount of pressure using
the tension adjustment knob.
7.
Check that the wire passes through the
center of the outlet guide tube without
touching the sides. Loosen the locking
screw and then loosen the outlet guide
tube retaining nut too make adjustment if
required. Carefully retighten the locking nut
and screw to hold the new position.
INSTALLATION & OPERATION
2
§4.3.4 MIG Torch Liner Types and Information
MIG Torch Liners
The liner is both one of the simplest and most important components of a MIG gun. Its
sole purpose is to guide the welding wire from the wire feeder, through the gun cable and
up to the contact tip.
Steel Liners
Most MIG gun liners are made from coiled steel wire also known as piano wire, which
provides the liner with good rigidity and flexibility and allows it to guide the welding wire
smoothly through the welding cable as it bends and flex during operational use. Steel
liners are primarily used for feeding of solid steel wire, other wires such as Aluminum,
Silicon Bronze, Etc. will perform better using a Teflon or Polyamide line. The internal
diameter of the liner is important and relative to the wire diameter being used. The
(8) A simple check for the correct drive tension
is to bend the end of the wire over hold it about
100mm from your hand and let it run into your
hand, it should coil round in your hand without
stopping and slipping at the drive rollers,
increase the tension if it slips.
(9) The weight and speed of the wire spool turning
creates an inertia that can cause the spool to run on
and the wire loop over the side of the spool and tangle.
If this happens increase the pressure on the tension
spring inside the spool holder assembly using the
tension adjustment screw.
INSTALLATION & OPERATION
2
§4.3.4 MIG Torch Liner Types and Information
MIG Torch Liners
The liner is both one of the simplest and most important components of a MIG gun. Its
sole purpose is to guide the welding wire from the wire feeder, through the gun cable and
up to the contact tip.
Steel Liners
Most MIG gun liners are made from coiled steel wire also known as piano wire, which
provides the liner with good rigidity and flexibility and allows it to guide the welding wire
smoothly through the welding cable as it bends and flex during operational use. Steel
liners are primarily used for feeding of solid steel wire, other wires such as Aluminum,
Silicon Bronze, Etc. will perform better using a Teflon or Polyamide line. The internal
diameter of the liner is important and relative to the wire diameter being used. The
(8) A simple check for the correct drive tension
is to bend the end of the wire over hold it about
100mm from your hand and let it run into your
hand, it should coil round in your hand without
stopping and slipping at the drive rollers,
increase the tension if it slips.
(9) The weight and speed of the wire spool turning
creates an inertia that can cause the spool to run on
and the wire loop over the side of the spool and tangle.
If this happens increase the pressure on the tension
spring inside the spool holder assembly using the
tension adjustment screw.
8.
A simple check for the correct drive
tension is to bend the end of the wire over
hold it about 100mm from your hand and let
it run into your hand, it should coil round in
your hand without stopping and slipping at
the drive rollers, increase the tension if it slips.
9.
The weight and speed of the wire spool turn-
ing creates an inertia that can cause the spool
to run on and the wire loop over the side of
the spool and tangle. If this happens increase
the pressure on the tension spring inside
the spool holder assembly using the tension
adjustment screw.
INSTALLATION & OPERATION
2
(4) Snip the wire carefully, be sure to hold
the wire to prevent the spool uncoiling.
Carefully feed the wire into the inlet guide
tube of the wire feed unit.
(3) Fit the wire spool onto the spool holder
fitting the locating pin into the location
hole on the spool. Replace the spool
retaining nut tightly.
(5) Feed the wire through the drive roller
and into the outlet guide tube of the wire
feeder.
(6) Lock down the top pressure roller and
apply a medium amount of pressure using
the tension adjustment knob.
(7) Check that the wire passes through the
center of the outlet guide tube without touching
the sides. Loosen the locking screw and then
loosen the outlet guide tube retaining nut too
make adjustment if required. Carefully retighten
the locking nut and screw to hold the new
position.
