Flux Core / Gasless Wire
- these wires are made up of a thin metal sheath that has fluxig and
metal compounds layered onto it and then rolled into a cylinder to form the finished wire. The
wire cannot take too much pressure from the top roller as it can be crushed and deformed if too
much pressure is applied. A knurled drive roller has been developed and it has small serrations in
the groove, the serrations grip the wire and assist to drive it without too much pressure from the
top roller. The down side to the knurled wire feed roller on flux cored wire is it will slowly over
time bit by bit eat away at the surface of the welding wire, and these small pieces will eventually
go down into the liner. This will cause clogging in the liner and added friction that will lead to
welding wire feed problems. A U groove wire can also be used for flux core wire without the wire
particles coming of the wire surface. However it is considered that the knurled roller will give a
more positive feed of flux core wire without any deformation of the wire shape.
3.1.5 Wire Installation and Set Up Guide
Again the importance of smooth consistent wire feeding during MIG welding cannot be
emphasized enough. The correct installation of the wire spool and the wire into the wire feed unit
is critical to achieving an even and consistent wire feed. A high percentage of faults with mig
welders emanate from poor set up of the wire into the wire feeder. The guide below will assist in
the correct setup of your wire feeder.
(1) Remove the spool retaining nut. (2) Note the tension spring adjuster and
spool locating pin.
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ADVANCEMIG 255C
