Thermal Arc C/W VFE 4C HS III, Руководство по эксплуатации

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10.02 Inconsistent wire feed
Wire feeding problems can be reduced by checking the following points:
1 Wire spool brake is too tight Feed roller driven by motor in the cabinet
will slip.
2 Wire spool brake is too loose Wire spool can unwind and tangle.
3 Worn or incorrect feed roller size Use 'U' groove drive feed roller matched
to the aluminium wire size you are
welding.
Use 'V' groove drive feed roller matched
to the steel wire size you are welding.
Use ‘knurled V’ groove drive feed roller
matched to the flux cored wire size you
are welding.
4 Mis-alignment of inlet/outlet guides Wire will rub against the mis-aligned
guides and reduces wire feedability.
5 Liner blocked with swarf Swarf is produced by the wire passing
through the feed roller, if excessive
pressure is applied to the pressure roller
adjuster.
Swarf can also be produced by the wire
passing through an incorrect feed roller
groove shape or size.
Swarf is fed into the liner where it
accumulates thus reducing wire
feedability
6 Incorrect or worn contact tip The contact tip transfers the weld current
to the electrode wire. If the hole in the
contact tip is to large then arcing may
occur inside the contact tip resulting in
the electrode wire jamming in the contact
tip
When using soft electrode wire such as
aluminium it may become jammed in the
contact tip due to expansion of the wire
when heated. A contact tip designed for
soft electrode wires should be used.
7 Poor work lead contact to work
piece
If the work lead has a poor electrical
contact to the work piece then the
connection point will heat up and result in
a reduction of power at the arc.
8 Bent or Mis-Shaped liner This will cause friction between the wire
and the liner thus reducing wire
feedability
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