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  1. #1
    Join Date
    Jan 2004
    Location
    Mackay North Qld
    Posts
    6,446

    Thumbs up Choosing GMA for a home welder

    Well fellas, here is the first installment of the series I promised about GMA -mig to you
    Why choose the GMAW Process for a home welder
    Advantages and disadvantages - Cost versus versatility – what it will & will not do

    Advantages
    No need to change electrodes
    No need to chip flux
    As a result of the above a lot of weld metal is deposited rapidly
    Good gap filling ability
    Can weld Ferrous metals and others

    Disadvantages
    Expensive purchase price and
    Consumable costs high – Wire Gas , gas cylinder rental, contact tips ,diffusers, and liners
    A high maintenance effort is required – a good troubleshooting knowledge for problems within the process is required
    There are many variables within the GMA welding process
    The process does not tolerate anything but a 100% clean welding surface free of any contaminants such as rust, oil, paint, grease or wax
    The visual appearance of the completed bead can look ok but CAN be prone to failure if incorrect settings are used.
    If a change in metal to be welded is desired, a change of many parts is required
    (Aluminium for example requires a contact tip change, a liner change, a change of driver wheels, driver wheel liner guides as well as the wire itself.)
    The process does not tolerate any breeze over say 4 KM/Hr.
    The radiation emission is about treble that of stick welding-unprotected body parts affected rapidly

    Summary
    Gmaw is a process that has better control of the arc pool as the input voltage is also able to be adjusted. Many uses prefer because it offers a greater versatility over a range of metal thicknesses and positions. Without knowledge of the tuning and maintenance procedures new operators can suffer problems due to the number of variable adjustments of the equipment.

    Thats one down
    Merry Xmas fellas
    Grahame

  2. #2
    Join Date
    Jun 2004
    Location
    Grafton, N.S.W.
    Age
    63
    Posts
    185

    Default

    Onya Grahame.
    Here, Have a greenie.
    Merry Xmas.
    Hooroo.
    Regards, Trevor

  3. #3
    Join Date
    May 2004
    Location
    Moo, G'day from CASINO NSW the real home of Beef.
    Age
    58
    Posts
    22

    Default

    What Trev said Grahame, keep it coming demystify the process for us mere non-ferrites .
    Bruce C.
    catchy catchphrase needed here, apply in writing to the above .

  4. #4
    Join Date
    Dec 2005
    Location
    Aus
    Posts
    156

    Default

    Hey Grahame
    Nice info, Merry Christmas

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