Mig Fluxcore Welder

19 September 2010

Clarke Mig Welder

30 August 2010

what polarity to use with mig welder?

ive just bought a clarke mig welder one of the type that can be used either with gas or gasless,ami right in assuming the polarity must be changed to suit and how do i do it pat

Conventional current runs from positive to negative. In reality current flow is the flow of electrons from negative to positive, the conventional direction was fixed before the nature of electricity of the structure of atoms was known. As the true flow is from negative to positive it makes sense for the electrode to be negative to carry the material across with it. Logical as this would seem this is not the usual case, in most cases the electrode is positive. If you need reversed polarity you can often just switch the leads around.

See

http://www.migtigarc.co.uk/Intro_MIG_Welding.pdf