Güde MIG 155/6W Mode D'emploi page 19

General information on welding in protective gas
The main area of use in workshops, universal use, suitable both for thinner sheet metals and for thicker materials. A
rule holds that the more welding levels are in the machine the better is its utilisation in work with sheet metal.
Necessary accessories: gas mixture Co 2/Argon, welding wire, welding shield, reducer valve. It fits also for aluminium
and high-grade steel VA when using a suitable gas and wire. (Pure argon/VA-wire/aluminium wire), potentiometer.
Operation
MIG 155/6W
Fig. 13
1. Adjustment of welding level
2. Adjustment of wire feeding speed
3. Hose connection
4. Grounding clamp connection
5. Mains connection plug
6. Pilot lamp „thermal protection"
7. Pilot lamp „operation"
Safety instructions for operator
•
Start using the machine only after having read the guide for operation carefully.
•
Respect all safety cautions provided in the guide.
•
Behave responsibly towards other persons.
•
Attention!!! Never use corroded welding wire.
Step-by-step guide
The zone to be welded should be free of any rust and varnish. Always use protective welding shield, protective welding
gloves and suitable protective clothing. The angle of the hose position towards the treated piece should be approx. 30
degrees.
1. Grind bright large surface at the processed piece in the areas of weld seam and connection of grounding clamp.
2. Now clamp the grounding clamp to the prepared place of treated piece.
3. Adjust parameters of the welding machine in accordance to the user table for welding (chap. 3).
4. Adjust required gas volume at the gas cylinder fittings.
Tip: (0.6 mm-wire → 6 l/h); (0.8 mm-wire → 8 l/h); (1.0 mm-wire → 10 l/h)
5.
6. If you have worn a complete protective clothes you may start welding.
good
Fig. 15
Tips for welding
Fault Cause and remedy
1.
Piece being treated is
2.
curved
1.
2.
Weld reinforcement
3.
4.
1.
Small layer of metal
2.
1.
Welds have oxidized 2.
appearance 3.
4.
1.
Insufficient fusing of the 2.
root 3.
4.
1.
Penetration 2.
3.
Tip: Before starting your own task please perform a trial welding to get
an optimum adjustment of the welding achieving an optimum result.
Fig. 14
Parameters for welding are set to optimum in case that a uniform noise
bad
can be heard and the welded seam has good penetration into the
material, namely it is relatively flat.
Bad preparation of seam
Straighten the edges and fix (fasten) for welding
Idle run voltage too low
Welding speed too low
Improper adjacent angle of the welding burner
Wire too thick
Too high welding speed
Too low voltage for the welding speed
Weld in a pit at long electric arc
Adjust the voltage
Wire is warped or it protrudes from the wire guide too much
Improper wire feeding speed
Irregular or insufficient distance
Improper adjacent angle of the welding burner
Wire guide tube worn-out
Too low wire feeding speed or welding speed
Wire feeding speed to high
Improper adjacent angle of the welding burner
Distance too large
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Example