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Straight answers to the questions people ask most when choosing and using a MIG welder that runs on a 110v supply.
These machines suit people who work where a reduced-voltage supply is required or preferred, such as some construction and site environments, where reduced-voltage tools are commonly used to lower the risk of electric shock. Check the rules that apply to your own site.They are also useful for maintenance and repair work where a heavier supply is not to hand.Because the supply limits the current, they are best for thinner material and lighter work rather than heavy fabrication.
It depends on the machine, but a 110v supply limits the current you can draw, so these welders are best for thin to moderate material. Thicker steel needs more power, or several passes with good preparation and a joint design that helps.Check the maker's stated capacity for the supply you will use, and do not expect the same performance as a machine running from a higher voltage.
A dual-voltage machine can run from either a reduced-voltage or a standard mains supply. It detects or is set for the supply, and the maximum output is normally lower on the reduced voltage.That means the same machine may weld thicker material on the higher supply. Check the maker's ratings for each voltage so you know what to expect.
On site you normally use a 110v supply from a site transformer or a generator that is set up to provide it. The machine's plug and cable must suit the supply, and the transformer or generator must have enough capacity for the welder's input current.Check the machine's input rating against the supply, and use cables of the correct rating and length. A weak supply or long thin cable can cause poor performance.
It depends on both machines, so check the welder's manual and data plate for its input current or power rating, and the generator's manual for its continuous output and whether it has a suitable 110v outlet.The generator needs enough continuous output for the welder's input demand with some margin, and some welders draw a surge when the arc strikes. Generator and welder makers may state which pairings suit, so follow their guidance. An undersized generator can cause tripping or an unstable arc, and may be damaged. If in doubt, ask a competent electrician.
Most of these machines can use the usual solid steel wire with a shielding gas, or a flux-cored wire without gas for outdoor or windy conditions. Some can also weld stainless steel or aluminium with the right wire, gas and setup, but check the manual.Use the wire size the machine is designed for, since the lower power suits finer wire more than heavy wire.