Table of Contents
Advertisement
SERVICE
5.01 Cleaning of the Unit
Periodically remove the right side panel (after disconnecting the supply cord from the receptacle) and blow out the interior with clean,
dry, compressed air of not more than 25 PSI air pressure. Do not strike any components with the air hose nozzle.
5.02 Cleaning of the Feed Rolls
Clean the wire groove on the feed roll at frequent intervals. This cleaning operation can be done by using a small wire brush. To clean
the wire groove, loosen the pressure device and lift the feedroll pressure arm. Remove all wire from the feedhead. Wipe off the bearing
roll (the "top" roll in the feedhead).
5.03 Basic Troubleshooting
The basic level of troubleshooting is that which can be performed without special equipment or knowledge, and without removing the
covers from the Power Source.
If major components are faulty, then the Power Source should be returned to an Accredited ESAB Service Agent for repair.
1. Porosity
When there is a gas problem the result is usually porosity within the weld metal. Porosity always stems from some contaminant within
the molten weld pool which is in the process of escaping during solidification of the molten metal.
Contaminants range from no gas around the welding arc to dirt on the work piece surface. Porosity can be reduced by checking the
following points:
1. Welding dirty, oily, painted, oxidized or greasy plate.
a. Clean contaminates off the plate.
2. Distance between the MIG torch nozzle and the work piece.
a. Keep the distance between the MIG torch nozzle and the work piece to a minimum.
2. Inconsistent wire feed
Wire feeding problems can be reduced by checking the following points:
1. Wire spool brake is too tight.
a. Feed roller driven by motor in the cabinet will slip.
2. Wire spool brake is too loose.
a. Wire spool can unwind and tangle.
3. Worn or incorrect feed roller size.
a.
Use 'V' groove drive feed roller matched to the steel wire size you are welding.
4. Misalignment of inlet/outlet guides.
a. Wire will rub against the misaligned guides and reduces wire feedability.
5. Liner blocked with slag.
a. Slag is produced by the wire passing through the feed roller, if excessive pressure is applied to the pressure roller
adjuster. Slag can also be produced by the wire passing through an incorrect feed roller groove shape or size. Slag is
fed into the 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 electrode wire jamming in there. When using soft electrode wire such
as aluminum, the wire 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.
a. 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.
a. This will cause friction between the wire and the liner thus reducing wire feedability
Service
SECTION 5:
SERVICE
5-1
FIREPOWER FP 95 FC
Manual 0-5122
Advertisement
Table of Contents
