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Instruções de Operação Metabo, Modelo MIG/MAG Welding Machine MIG/MAG 351 E

Fabricante : Metabo
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For PA-liners with 4.7 mm outer diameter no support tube is required. 8. Attach torch lead assembly to machine and cut off (do not pinch off with cutting pliers) the PA-liner just in front of the feed roller. 9. The cutoff liner piece is installed between the wire spool and wire feed unit, to provide for easy guiding here too. 10. To thread the aluminium wire into the lead assembly temporarily remove the contact tip. Thread wire into liner. Set guide rollers to match wire diameter and pressure roller to only minimal pressure, so it will not flatten the wire by excessive pressure. Let wire run through lead assembly until it shows 2-3 cms at the headstock. 11. Replace contact tip and gas shroud. 25 Welding aluminium requires a pure inert gas, such as Argon or Helium. The gas flow rate should be set to 10-13 l/min for the MIG/MAG 301 E, for the MIG/MAG 351 E a gas flow rate of 13-16 l/min is recommended. The minimum electrode wire diameter should be 0.8 -1.2 mm. Forehand welding is recommended to keep the seam from tarnishing. Available aluminium welding conversion kit are listed below. Conversion kits for aluminium welding: Stock-no. Wire-0 Length 132 714 4550 PA-liner c/w Cu-liner 0.6-1.0 3 m 132 714 4541 PA-liner c/w Cu-liner 0.6-1.0 4 m 132 714 4533 PA-liner c/w Cu-liner 0.6-1.0 5 m 132 762 0858 PA-liner c/w Cu-liner 1.0-1.4 3 m 132 762 0866 PA-liner c/w Cu-liner 1.0-1.4 4 m 132 762 0874 PA-liner c/w Cu-liner 1.0-1.4 5 m 4.2 High-Alloy Steels Depending on the material specification high-alloy steels can be welded just like regular low-carbon steel with mixed or pure shielding gas. Specific shielding gas mixtures can be adapted. The welding current is set as for low-carbon steel. The torch lead assembly should be fitted with a polyamid liner. A gas flow rate of approx. 10-13 l/min is recommended. To prevent a porous weld seam forehand welding is recommended. 5 Safety Precautions/Accident Prevention Always disconnect from power before servicing or carrying out maintenance or repair work. Servicing of electrical components should only be carried out by a qualified electrician. This welding power source conforms to the applicable standards and safety regulations at the time it is shipped from the factory. The open-circuit voltage is below the legal limit for welding in confined spaces with electrically conductive walls, or in environments with increased electrical hazard in general (according to UVV 26.0) The welding power source itself may not be located within an environment with an increased electrical hazard. After actuating the trigger switch of the torch the electrode wire is under current. All local regulations regarding accident and fire prevention when welding have to be observed (for Germany these are UVV 26.0 "Welding, Cutting..."). Always wear welder's gloves, leather apron and dry clothing. Use a welding helmet or hand shield with protective glasses according to DIN 4647. Always switch machine off and close gas cylinder valve when work is finished. Handle gas cylinders carefully; do not throw or heat,, keep from falling over. Remove cylinder from machine if machine is to be hoisted by crane. Workpieces, which have been degreased with chlorinated solvents, should be rinsed thoroughly with water afterwards. Otherwise there is danger of phosgene gas developing. For the same reason no degreasing baths should be located in the vicinity of the work area. Caution, all metallic fumes are hazardous! This warning applies to lead, copper, cadmium, zinc and beryllium in particular. Keep work area well ventilated; use respiratory gear if necessary. 6 Service and Maintenance Elektra Beckum welding machines require only minimal maintenance. Depending on dust built-up, but at least every 3-4 months, the machine should be cleaned with dry and oil-free compressed air and all components given a visual check. The contact tip and gas shroud are the parts most exposed to the radiant heat of the arc. They need to be cleaned regularly of spatters and treated with anti-clogging spray and/or nozzle dip. Excessive built-up of spatters can short-circuit contact tip and gas shroud, ruining both. The machine should be checked at regular intervals for visible defects. A thorough check of the electrical components should be carried out every 6 months. Disconnect machine completely from power supply (pull plug; switching off circuit breakers or removing fuses is no adequate separation). Retighten all screw and clamping terminals. Have a qualified electrician check-out and repair any scorched leads or cables, including the power supply cable. Check coolant level, if low have a service technician check for the cause. When ordering spare parts state machine model, production no. and stock number of the required part(s). 26 7 Troubleshooting Fault Cause Remedy Irregular wire feed Incorrect tension of tension roller Wire guide of feed motor not aligned Liner clogged or not of correct size for ...