Fitting wearing parts and inner liner Connecting the welding torch to the wirefeeder Service, maintenance and disposal General Identifying defective wearing parts Maintenance at the beginning of each working day Maintenance at every wirespool/basket-type spool replacement Troubleshooting Troubleshooting Technical data General MTG 350i AS-Style...
Safety Safety WARNING! Danger from incorrect operation and work that is not carried out properly. This can result in serious personal injury and damage to property. ▶ All the work and functions described in this document must only be carried out by technically trained and qualified personnel.
Functions of the torch trigger Function of the single-staged torch trigger Torch trigger in switch position (torch trigger fully depressed) = welding start.
Equipping and connecting the welding torch Note on inner NOTE! liner in gas- cooled welding Risk due to incorrect wire-guide insert. torches This can result in poor-quality weld properties. ▶ If a plastic inner liner with a bronze wire-guide insert is used in gascooled welding torches instead of a steel inner liner, the power data stated in the technical data of the welding torch must be reduced by 30%.
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Left: Brass clamping nipple with seal ring. You cannot see through the seal ring. Right: Silver clamping nipple with visible bushing NOTE! Incorrect or defective clamping nipple in push applications This results in gas loss and poor weld properties ▶ Use brass clamping nipples to minimize gas loss ▶...
Fitting wearing parts and inner liner Lay out the welding torch straight...
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Lay out the inner liner straight before further use; ensure that no burr protrudes into or out of the inner liner Insert the inner liner into the welding torch...
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Insert the inner liner until it protrudes from both the front and the back of the welding torch Use the contact tip to push the inner liner completely into the welding torch; screw the contact tip tight...
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Mark the end of the central connector on the inner liner Cut the inner liner at the marking and ensure that no burr protrudes into the inner liner; left inner liner made of steel, right inner liner made of plastic...
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Deburr the inner liner Screw the cap onto the inner liner up to the stop. The inner liner must be visible through the hole in the cap...
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Tighten the clamping nipple Fit the gas nozzle ** Screw the gas nozzle tightly up to the stop...
Service, maintenance and disposal General Regular and preventive maintenance of the welding torch are important factors in achieving problem-free operation. The welding torch is subjected to high tem- peratures and high levels of soiling. This is why the welding torch needs more fre- quent maintenance than other components of the welding system.
Insulation Burnt outer edges, notches Nozzle fitting Burnt outer edges, notches Heavily coated with welding spatter Contact tip Ground (oval) wire entry and wire exit bores Heavily coated with welding spatter Penetration at the tip of the contact tip Gas nozzle Heavily coated with welding spatter Burnt outer edges Notches...
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Clean wearing parts using compressed air Recommended: Replace the inner liner...
Remedy: Replace welding torch No function after pressing torch trigger Power source switched on, power source indication illuminates Cause: FSC (‘Fronius System Connector’—central connector) not inserted up to the stop Remedy: Insert FSC up to the stop Cause: Welding torch or welding torch control line faulty...
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Poor-quality weld properties Cause: Incorrect welding parameters Remedy: Correct settings Cause: Poor ground earth connection Remedy: Establish good contact with workpiece Cause: Too little or no shielding gas Remedy: Check pressure regulator, gas hose, gas solenoid valve, and welding torch gas connection. For gas-cooled welding torches, check gas seal, use suitable inner liner Cause: Welding torch leaks...
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Cause: Wirefeed components do not correspond to the diameter of the wire electrode/the material of the wire electrode Remedy: Use correct wirefeed components Poor wirefeeding Cause: Depending on the system, brakes in the wirefeeder or power source set too tightly Remedy: Set the brakes to be looser Cause:...
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Welding torch gets very hot Cause: Only in multi-lock welding torches: Union nut of the torch body loose Remedy: Tighten union nut Cause: Welding torch has been operated above the maximum welding cur- rent Remedy: Reduce welding power or use more powerful welding torch Cause: Welding torch is inadequately sized Remedy:...
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Malfunction of the torch trigger Cause: Faulty plug connections between the welding torch and the power source Remedy: Establish correct plug connections/send power source or welding torch to service team Cause: Soiling between torch trigger and torch trigger housing Remedy: Remove soiling Cause: Faulty control line...
Technical data General Voltage rating (V-peak) For hand-held welding torches: 113 V For machine-guided welding torches: 141 V Torch trigger technical data: = 5 V = 10 mA The torch trigger can only be operated within the limits of the technical data. This product meets the requirements set out in standard IEC 60974-7/- 10 CI.
手動の溶接トーチ:113 V 機械駆動溶接トーチ:141 V トーチトリガの技術データ: = 50 V 最大 = 10 mA 最大 トーチトリガの操作は、技術データに従ってのみ行います。 この製品は、IEC 60974-7 / - 10 Class A 規格の要件に適合しています。 MTG 350i AS-Style 保護ガス(標準 EN ISO 14175) 混合ガス 10 分/40°C(104°F) 1) 1) 20%使用率 / 350 A 20%使用率 / 300 A での...
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