9
Northern Industrial Welder
Operating Instructions and Parts Manual
MIG 130
• Make certain that the welding
wire is actually going into the torch
liner. If not, the wire will jam up in
the mechanism.
4.2.11 Line the wire up with the
correct groove in the drive roller.
Place the drive tension arm back
above the drive roller.
4.2.12 Place the drive tension
adjustment arm back in place.
4.2.13 Tighten (turn clockwise) the
drive tension adjusting knob until the
tension roller is applying enough
force on the wire to prevent it from
slipping in the drive rollers.
4.2.14. NOW YOU CAN LET LOOSE
OF THE WIRE.
4.2.15. Plug in and turn the welder
ON. Set the VOLTAGE switch to the
voltage (heat) setting recommended
for the gauge metal that is to be
welded. Refer to the set up chart on
the back side of the drive
compartment door.
4.2.16. Set the WIRE SPEED control
to the middle of the wire speed range.
4.2.17. Straighten the MIG gun cable
and pull the trigger in the gun handle
to feed the wire through the torch
assembly. When at least one inch of
the wire sticks out past the end of the
torch, release the trigger.
4.2.18 Turn the Power Switch to the
OFF position.
4..2.19 Select a contact tip stamped
with the same diameter as the wire
being used.
NOTE:
Due to inherent variances in flux-
cored welding wire, it may be
necessary to use a contact tip one
size larger than your flux core wire if
wire jams occur.
4.2.20. Slide the contact tip over the
wire (protruding from the end of the
MIG gun). Thread the contact tip into
the end of the gun and hand-tighten
securely.
4.2.21. Install the nozzle on the gun
assembly. To keep spatter from
sticking to inside of the nozzle use
anti-spatter spray or gel.
4.2.22 Cut off excess wire that
extends past the end of the nozzle
more than ¼”.
4.2.23. Turn the welder ON
5. Setting the wire tension
Arc flash can injure eyes! To
reduce the risk of arc flash, make
certain that the wire coming out of
the end of the torch does not come
in contact with work piece, ground
clamp or any grounded material
during the drive tension setting
process or arcing will occur.
5.1. Press the trigger on the gun.
5.2. Turn the drive tension adjustment
knob clockwise, increasing the drive
tension until the wire seems to feed
smoothly without slipping.
When MIG wire is used, shielding gas
is required.
1. Polarity
changing:
Factory polarity setting (electrode
negative) is for flux core welding (no
shielding gas is required). In this
process the RED gun lead is
connected to negative (“-”) polarity
terminal and ground cable is
connected to the positive (“+”)
terminal.
For MIG (solid wire) using shielding
gas the RED gun lead is connected to
positive (“+”) and the ground cable is
connected to negative (“-”). See
below.
