GWH4 datasheet(3/44 Pages) CLARKE

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PRINCIPLES OF THE MACHINE

The MIG250 Multi is an inverter type welding machine, suitable to carry out Gas and

No Gas CO2 welding, MMA, TIG and MIG. The welder is mainly used for CO2 gas

protected welding which has the advantages of high energy efficiency, strong arc

penetration and small welding deformation.

Weldable materials include low carbon steel, low alloy steel, high strength steel,

stainless steel and aluminium alloy. Methods include full position spot welding, butt

welding, fillet welding and lap welding. The stable welding process can be obtained

by using pure CO2, CO2+Ar, CO2+ O2 and other protective gases. The torch is suitable

for wire diameters of 0.8-1.0mm.

Manual Metal Arc (MMA) welding uses a coated, consumable electrode (stick) to

lay the weld. The arc melts the core of the electrode to produce drops of molten

metal (weld pool) to create the welded joint. Because of the versatility and simplicity

of MMA welding, it requires less skill and is used primarily to weld iron and steel

(including stainless steel). but nickel and copper can also be welded using this

method.

MIG (Metal Inert Gas) welding allows you to fuse together two similar metals

without altering the properties of the metal. A consumable wire electrode is

continuously fed through the welding torch fitted with a concentric gas nozzle. the

wire is connected to a high voltage supply which creates an electric arc between the

electrode (the wire) and the workpiece. The arc is used to create the required heat to

turn the metal into a molten state. The wire is used as both the electrode and as a

filler.

The gas is used to prevent oxidation and to shield the arc and the weld from

atmospheric contamination. The choice of gas is dependent upon the material being

welded. This machine is designed to be used for both metal ARC (MMA) and TIG

welding.

TECHNICAL FEATURES

This welder adopts IGBT (insulated-gate bipolar transistor) soft switch inverter

technology, the single-phase power input, after rectifying, will be converted to 20KHz

high frequency AC by the IGBT, then the voltage drops after HF transformer, second

rectification and filtering to be a welding suitable DC (Direct Current). Through this

process, the dynamic response speed of the welded power supply is improved and

makes it more compact. The control circuit controls the whole machine so that the

welding power supply has good anti-grid fluctuation ability and excellent welding

performance.

• The MIG250 Multi is equipped with high-speed ARM platform, adopting a unique

fine waveform control method with low spatter and an elegant weld bead.

• The MIG250 Multi gives a freely adjustable arc shape with the “Arc Control” knob

and can set the inductance of the arc.

GWH4 Datasheet(PDF) 3 Page - Clarke International