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13. Let go of the wire.
14. Connect the welding unit power cord to the power source.
15. Turn the welding unit ON.
16. Set 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.
17.
Set the wire speed control to the middle of the wire speed range.
18. Straighten the torch cable and pull the trigger on the welding torch to
feed the wire through the torch assembly.
19. When at least an inch of wire sticks out past the end of the torch, release
the trigger.
20. Turn the power switch to the OFF position.
21. Select a contact tip stamped with the same diameter as the wire being
used. If stamped in metric, use Table 1.
a.
A contact tip one size larger may be required if the wire jams due to
inherent variances in
flux-cored welding wire.
22. Slide the contact tip over the wire protruding from the end of the torch.
Thread the contact tip into the end of the torch and hand-tighten securely.
23. Install the nozzle on the torch assembly. For best results, coat the inside
of the nozzle with anti-stick spray or gel.
24 Cut off the excess wire that extends past the end of the nozzle, but leave
a short stub.
25. The wire feed is ready for use.
SET THE WIRE DRIVE TENSION
Prevent an arc flash from occurring during the process of setting the drive
tension, by not allowing the wire coming out of the torch to contact with the
workpiece, ground clamp or any grounded material.
1.
Pull the trigger on the torch.
2.
Turn the drive tension adjustment knob clockwise, increasing the drive
tension until the wire seems to feed smoothly without slipping.
The wire should not slip between the wire and the drive roller under normal
conditions. An obstruction in the wire feed path will cause the wire to slide on
the drive roller.
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90A Flux Core Welder
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