Inspection And Maintenance - Gude MIG 155/6W Originalbetriebsanleitung

The zone to be welded should be rid of rust and varnish. The burner is selected according to the type of material. It is
recommended to try the strength of current on a defective piece first.
Faults - Causes - Elimination
Fault Cause
1.
Welding current drops
out
Welding current not 1.
available at all.
Protective power switch
or RCD fell out
1.
Welding current is not
available . 2.
3.
Wire feeding motor does 1.
not operate, pilot lamp is 2.
on. 3.
1.
2.
Wire feeding motor does
3.
not work, Pulleys rotate.
4.
5.
1.
2.
Wire feeding is irregular. 3.
4.
5.
1.
Electric arc burns in 2.
unstable way. 3.
1.
2.
3.
4.
Welded joint is porous.
Welding wire stops in 1.
proximity of stream 2.
nozzles 3.
Welding pressure is 1.
irregular
1.
Too weak penetration 2.
1.
2.
Too strong penetration
3.

Inspection and maintenance

Maintenance of hose set
Regular maintenance must be performed to ensure faultless function of hoses.
Gas nozzle must be sprayed by protective spray for nozzles and remove sediments inside regularly.
For this case the following steps should be performed (see Fig. 26):
1. Remove the nozzle (1) by pulling it forward.
– Protection against excessive temperature
fell out due to overload.
Mains fuse fell out
Bad contact between grounding clamp and
welded part
Rupture in grounding cable or grounding line
Rupture in burner line
Fuse is burnt.
Toothed rim is faulty or blocked.
Motor is defective.
The pressure to the pulley is not adjusted
properly.
There is dirt, dust etc. on the stream nozzle of
the burner.
Gas nozzle is defective.
The wire is warped.
Inner tube of the wire guide is dirty or
damaged.
Dirt at the wire guide. Gas nozzle is worn-out
or defective.
Gas nozzle is clogged.
An obstacle restrains the wire feeding pulleys
guiding.
Wire feeding pulleys guiding has deformed.
Improper tension of the wire
Improper wire speed adjustment
Dirt at the welded place.
Gas nozzle is worn-out or defective.
No gas
Nozzle holder is blocked
Material is rusty or damp
Burner is too far or you hold it at incorrect
angle towards the point being welded.
Stream nozzle is worn-out.
Welding wire is warped.
Wire feeding speed is too low.
Welding wire blocked on the coil
Welding current too weak
Electric arc too long
Welding current too high
Wire feeding speed too slow
Improper distance of the burner from piece
being processed
Elimination
1. Protection against excessive temperature will
perform automatic reset after cooling the transformer
(approx. after 10 minutes, take care of ED!)
1. Let the fuse checked
2. Turn the protective output power switch on
3. Turn the RCD on
1. Clean and grind the welded area and surface of the
part.
2. Repair or replace the grounding cable.
3. Repair or replace the burner.
1. Replace the 2 A-fuse.
2. Replace the toothed rim.
3. Replace the motor (contact customer service).
1. Adjust the pressure to pulleys correctly.
2. Clean the machine contact tube. Use an air
compressor to do so, in case of heavy contamination
replace the contact tube
3. Replace the gas nozzle and check the tip.
4. Check the pulley pressure and adjust it properly if
necessary,
5. Clean with compressed air and let the hose replaced
if necessary.
1. Clean the machine wire guide using an air
compressor.
2. Replace the gas nozzle or contact tube.
3. Clean or replace the gas nozzle.
4. Clean the wire feeding pulleys.
5. Replace the wire feeding pulleys.
6. Adjust the wire tension properly.
1. Adjust the wire speed according to recommended
systems.
2. Clean or polish the welded surface.
3. Replace the gas nozzle and check the tip.
1. Open the gas and adjust the gas intake flow.
2. Clean or replace the gas nozzle.
3. Properly treat the place of welding or increase the
gas inflow.
4. Clean or polish the material.
5. Distance between the gas nozzle and processed
piece must be 8-10 mm and the hose should be held
at an angle of 30°.
6. Check the rubber hose, connection and hose set
assembly. – Depress the gas nozzle into proper
position.
1. Replace the stream nozzle.
2. Check the pulley tension pressure.
3. Follow the instructions for wire feeding speed.
1. Check the pressure of pulley tension and adjust if
necessary.
1. Increase the welding current and wire feeding.
2. The hose should be held near the piece being
processed.
1. Reduce the welding current and wire feeding.
2. The burner should be moved calmly and uniformly.
3. The distance of the nozzle from the piece being
processed must be 8-10 mm.
20