A MIG gun may stop feeding wire because of a worn or blocked liner, incorrect drive roll tension, a worn contact tip, excessive spool tension or damaged welding wire. Check the complete wire-feeding path from the spool and drive rolls to the liner and contact tip. Replacing worn consumables and adjusting the drive system according to the welding machine manufacturer's recommendations can often restore smooth wire feeding.

MIG contact tip burnback can be caused by incorrect welding parameters, excessive wire stickout, poor wire feeding, an incorrect contact tip size or a worn contact tip. Check the wire feed system, contact tip condition and welding parameters to identify the cause.

TIG tungsten can melt or overheat because of excessive current, incorrect polarity, insufficient shielding gas, an undersized tungsten electrode or inappropriate AC settings. Select the correct tungsten size and type for the welding current and application, and verify the shielding gas and polarity.

A TIG torch may become excessively hot when the welding current exceeds its rated capacity or duty cycle, when the torch is not adequately cooled, or when the torch and consumables are not correctly matched to the application. For higher-current or extended welding operations, a water-cooled TIG torch may be appropriate.

A plasma cutter may fail to start an arc because of worn or incorrectly installed consumables, insufficient air or gas supply, poor electrical connections, incorrect torch components or problems with the torch or power source. Inspect the consumable stack, gas supply, connections and torch condition before operating the system.

A plasma arc may stop during cutting because of worn consumables, unstable gas pressure, poor air quality, incorrect torch height, improper piercing technique or electrical connection problems. Inspect the electrode and nozzle first, then check the gas supply, torch height and operating parameters.

Excessive plasma cutting dross can be caused by incorrect cutting speed, torch-to-work distance, amperage, voltage or worn consumables. Low-speed dross usually appears as a heavier deposit along the bottom edge, while high-speed dross can form when the torch travels too quickly.

Incomplete plasma cuts can result from insufficient cutting current, excessive cutting speed, incorrect torch height, worn consumables, poor gas supply or selecting a cutting process that is not suitable for the material thickness. Check the consumables, cutting parameters, torch height and gas supply before increasing current.

Plasma consumable life depends on cutting current, material type and thickness, piercing frequency, cutting parameters, gas quality and operating technique. Instead of replacing parts only according to a fixed time interval, inspect the electrode and nozzle for wear and monitor changes in cut quality.

INWELT manufactures and exports MIG torches (including heavy-duty and push-pull guns), TIG torches, plasma torches and welding guns, robotic and laser torches, smoke extraction equipment, and welding torch accessories. Products cover the full welding ecosystem — from MIG/TIG to plasma, from AI intelligent equipment to green welding systems.

Every torch leaving the production line is 100% tested, not sampled, through five key tests: Conductivity test, Airflow test, Short-circuit test, Resistance test, Insulation test. Water-cooled torches additionally undergo water flow rate and air-tightness testing.

Cables are not accessories — they are the lifeblood of the welding torch. During welding, resistance, temperature rise and voltage fluctuation directly affect weld stability and quality. That is why INWELT insists on 99.9% oxygen-free copper cables with the correct cross-sectional area, exceeding national specifications.

Welding fumes are airborne particles and gases generated when heat from welding melts or vaporizes metal, filler materials, coatings, fluxes, and other substances around the welding arc. Their composition varies depending on the welding process, base metal, consumables, coatings, and operating conditions.

Exposure to welding fumes can cause short-term irritation and respiratory symptoms and may contribute to serious long-term occupational health risks. Potential effects depend on the welding process, materials, exposure concentration, duration, ventilation, and individual circumstances.