Thermal Arc Viking 210GM, Руководство по эксплуатации

Страница: 34 / 42

Viking 210GM, 250GM
29
WARNING 8
Disengage the drive roll when testing for gas flow by ear.
b) 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.
1. Wire spool brake is too loose. - Wire spool can unwind and tangle.
1. 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.
1. Mis-alignment of inlet/outlet guides. - Wire will rub against the mis-aligned
guides and reduces wire feedability.
1. 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.
1. 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.
1. 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.
1. Bent liner. - This will cause friction between the wire
and the liner thus reducing wire feedability