Operating Instructions and Parts Manual
Metal man Industrial Welder
12
MIG 135
MIG WELDER
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 torch.
5.2. Turn the drive tension adjustment
knob clockwise, increasing the drive
tension until the wire seems to feed
smoothly without slipping.
6.Gas installation
Shielding gas cylinders and high
pressure cylinders can explode if
damaged, so treat them carefully.
-Never expose cylinders to high
heat, sparks, open flames,
mechanical shocks or arcs.
-Do not touch cylinder with MIG
gun.
-Do not weld on the cylinder.
-Always secure cylinder upright to
a cart or stationary object.
-Keep cylinders away from welding
or electrical circuits.
-Use the proper regulators, gas
hose and fittings for the specific
application.
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.
2. The gas hose, regulator and
gas cylinder connections
Connect the gas hose to the gas
solenoid valve on the back panel of
the welder. Connect the other end to
the regulator connected to the
shielding gas cylinder. See the
following illustration.
2
1
7
Cylinder valve: Controls GAS CYLINDER
flow.
1.
Cylinder pressure gauge
2.
Gas flow gauge, set at 20 CFM
3. Regulator
4.
Adjustment knob: Controls gas flow
to the welder.
