211i Operating Manual FabricatOr® - Victor Technologies - Europe

FABRICATOR 211i BASIC WELDING
Solving Problems Beyond the Welding Terminals - Inconsistent Wire Feed
Wire feeding problems can be reduced by checking the following points.
FAULT CAUSE
1 Feed roller driven by motor in the
cabinet slipped.
Wire spool brake is too tight.
2 Wire spool unwinded and tangled. Wire spool brake is too loose.
3 Worn or incorrect feed roller size A Use a feed roller matched to the size you are welding.
B Replace feed roller if worn.
4 Wire rubbed against the mis-aligned
guides and reduced wire feedability.
Mis-alignment of inlet/outlet guides
5 Liner blocked with swarf A Increased amounts of swarf are produced by the wire
passing through the feed roller when excessive pressure
is applied to the pressure roller adjuster.
B Swarf can also be produced by the wire passing
through an incorrect feed roller groove shape or size.
C Swarf is fed into the conduit liner where it accumulates
thus reducing wire feedability.
6 Incorrect or worn contact tip A The contact tip transfers the weld current to the electrode
wire. If the hole in the contact tip is too large
then arcing may occur inside the contact tip resulting
in the wire jamming in the contact tip
B When using soft 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
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 liner This will cause friction between the wire and the liner
thus reducing wire feedability
Table 4-3: Wire Feeding Problems
BASIC WELDING GUIDE 4-8 Manual 0-5225