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Parts and accessories for a multi-voltage DC inverter TIG welder: torches, cables, trolleys, cases and function options explained.
Begin with the rating plate and the manual. The plate lists the maker, supply requirements and performance, and the manual shows which torches, cables, trolleys and options are listed for the machine. For a replacement, compare the number or marking on the old part and check connector type, thread and rating, not only the look of the part.If the manual is missing, the plate may be all the information you have, so record it before ordering. Our team can help you match a part if you send the plate details.
The usual groups are torches and torch heads, return (earth) cables with clamps, remote controls, carry cases, trolleys of different sizes and software or function packages that add features. Some are interchangeable between similar machines and some are not.Check the manual for the compatible list. Some items need a particular connector, and some options have to be installed or switched on in the welder before they work.
Generally not well. DC with the electrode negative puts most of the heat into the work but gives little cleaning of the surface, so the oxide skin on aluminium is not broken up. AC is used for aluminium because the electrode-positive part of each cycle helps clear the oxide.A DC machine is well suited to steel, stainless steel and similar metals. If you need to weld aluminium regularly, choose an AC/DC machine instead of looking for parts to adapt a DC one.
A switch on the torch starts and stops the arc and the gas. In 2T mode you press to start and release to stop. In 4T mode you press and release to start, then press and release again to stop, which is easier on the finger during long welds.Upslope and downslope settings raise and lower the current at the start and end of the weld, and a gentle downslope helps fill the crater and reduce cracking. How each mode behaves can differ between welders, so check your welder's manual.
A foot pedal gives fine, continuous control of current while keeping your hands on the torch, which many welders like for precise work. A torch-mounted control is easier in awkward positions, but adjusting it can move the torch slightly. Some welders prefer torch controls on the handle for convenience.Before choosing, make sure the plug and control system are listed as compatible with your welder and that the machine is set to accept the remote, as connectors and settings differ.
High-frequency start strikes the arc without touching the work, which is why it is often preferred for high quality welds. Its drawback is interference with nearby electronics such as computers, phones, controls and medical equipment. Lift arc starts with a light touch of the electrode and a low current, and it is often used where interference matters.Your welder's design decides which methods it has. Check the manual before buying leads or torches so they suit the start method.