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Straight answers to the questions people ask most when choosing and using a compact, portable multi-process welder.
It is a small, light, portable machine that can do more than one welding process, typically MIG, TIG and stick (manual metal arc) from a single unit. It suits mobile engineers, farms, garages, maintenance teams and small workshops that need flexibility rather than a machine for each process.It is designed for light to medium duty, not continuous heavy production. Think of it as a versatile all-rounder for repairs, fabrication of lighter sections and site work.
A dual-voltage machine can run from either a reduced voltage site supply or a standard single-phase mains supply, usually by changing the plug or selecting the supply on the machine. This is very useful on building sites and in workshops where only one type of supply is to hand.Output is lower on the reduced voltage supply than on the standard supply, so you cannot weld thick material to the same limits. Check the manual for the output on each supply before you rely on it for a given job.
Mild steel and stainless steel are the typical materials, and with the right wire, gas and feeding set-up, aluminium can be welded too. Thickness range depends on process and supply voltage, so check the output limits in the manual.It is well suited to sheet, tube and light structural work. For regular heavy plate, high duty cycles or production welding, a larger three-phase machine is the better tool.
For TIG you need a TIG torch, a gas regulator with argon, tungsten electrodes, filler rods, and the correct collet and nozzle sizes. For stick you need an electrode holder, an earth lead and suitable electrodes.These processes use direct current for steel and stainless steel. Check what your particular machine supports, because not all small multi-process units can weld aluminium with TIG, which needs alternating current.