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Note:
If TOO MUCH tension is applied to the wire spool,
the wire will slip on the drive roller or will not be able
to feed at all. If TOO LITTLE tension is applied, the
spool of wire will want to unspool itself. Readjust
the drive brake tension as necessary to correct for
either problem.
7. After checking to make sure that your welder is
disconnected from the ac power source, free the leading
end of the wire from the spool, but do not let go of it until
told to do so, or the wire will unspool itself.
8. Using a wire cutter, cut the bent end off the leading end of
the wire so that only a straight leading end remains.
9. Loosen the tension adjusting screw holding the drive
tension arm in place and lift the tension arm up off the drive
roller.
10. Insert the leading end of the wire into the inlet guide tube.
Then push it across the drive roller and into the gun
assembly about six inches.
Make certain that the welding wire is actually going into the
gun liner. Be very sure it has not somehow been
accidentally been routed alongside the liner or even in
some other direction. If this should happen, the wire could
feed inside the cable casing or take a right angle and
follow the wires and gas hose inside the welder. It could
also feed back on itself jamming up the mechanism.
11. Line the wire up in the inside groove of the drive roller, then
allow the drive tension arm to drop onto the drive roller.
12. Tighten (turn clockwise) the drive tension adjusting screw
until the tension roller is applying enough force on the wire
to prevent it from slipping out of the drive assembly.
13. Let go of the wire.
14. Connect the welder power cord to the ac power source.
Turn the welder ON by setting the VOLTAGE switch to the
voltage (heat) setting recommended for the gauge metal
that is to be welded. Refer to the label mounted on the
cover, inside the drive compartment, for recommended
voltage (heat) settings for your welding job. The VOLTAGE
selector controls the weld heat. There is an OFF and four
voltage (heat) selections (numbered 1 through 4) available
on this welder. Numbered position 1 provides the lowest
voltage (heat) and position 4 the highest voltage (heat).
15. Set the WIRE SPEED control to the middle of the wire
speed range.
16. Pull the trigger on the welding gun to feed the wire through
the gun assembly.
17. When at least an inch of wire sticks out past the end of the
gun, release the trigger.
18. Select a contact tip stamped with the same diameter as the
wire being used. If stamped in metric, see DESCRIPTION.
19. Slide the contact tip over the wire (protruding from the end
of the gun). Thread the contact tip into the end of the gun
and hand-tighten securely.
20. Install the nozzle on the gun assembly. For best results,
coat the inside of the nozzle with anti-stick spray or gel
(part #4312, not supplied).
21. Cut off the excess wire that extends past the end of the
nozzle.
CAUTION
SET THE WIRE DRIVE TENSION
WARNING
To reduce the risk of arc flash, make certain that the wire
coming out of the end of the gun does not come in contact
with the workpiece clamp or any grounded material during
the drive tension setting process or arcing will occur.
1. Pull the trigger on the gun.
2. Turn the drive tension adjustment knob clockwise,
increasing the drive tension until the wire seems to feed
smoothly without slipping.
3. Block the end of the nozzle by holding it up against
something that doesn't conduct electricity, such as a block
of wood or a concrete floor, then trigger the gun again. The
wire should slip at the drive roller. However, if the wire
bird-nests at the drive roller, rethread the drive system
using less drive tension and try again.
4. When the drive tension is set correctly, there should be no
slippage between the wire and the drive roller. However, if
an obstruction occurs along the wire feed path, the wire
should then slip on the drive roller.
PREPARATION
CHANGE POLARITY
This welder allows you the capability to change the welding
current polarity. You may select either dc Straight (dc – Flux
Cored) or dc Reverse Polarity (dc + MIG). For welding steel
with solid wire, stainless steel, flux cored hardfacing of steel,
and silicon bronze welding of steel, select dc Reverse Polarity
(dc + MIG). When using self-shielding, flux-core steel wire, use
dc Straight Polarity (dc – Flux Cored).
Change the polarity of your welder according to the following
procedure steps. Figure 8 shows what the polarity block should
look like for each polarity setting.
Do not use a ratchet, crescent or other lever type wrench
to tighten the nuts on the polarity bus. The nuts must be
hand tightened with a 7/16 inch nut driver only. Too much
torque applied to the one of the nuts could cause the
threaded post to break off.
Tools Required:
•
7/16 inch nut driver
1. With a 7/16 inch nut driver, remove all four nuts and pull
out the vertically mounted copper straps.
2. Replace the copper straps horizontally in the dc Straight
Polarity (dc – Flux Cored) configuration shown in Figure 8.
DC +
MIG
Figure 8. Welder Polarity Selections
CAUTION
DC –
FLUX CORED
11
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