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* Machine strikes an arc between the work and a consumable wire electrode, melting a pool of metal
** Welding isn't like soldering, welding melts the pieces of metal and allows them to flow together and mix with the filler material. When it re-solidifies it's one continuous piece of metal
* Wire dips in and out, adding metal to the pool
* Gas shields the hot metal from the air
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* Arc-eye hazard to you and people around you
** Using an auto-darkening welding mask
** Checking masks with a strong light source
** Suitable settings on mask (9-11, 12 maybe - start at 10 and adjust)
** Shouting "Eyes" if there are other people around
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** The voltage is low, but you still don't want to touch it
** Mind what you point the torch at
** Power on this welder cuts off as soon as the trigger is released, which is not the case for all welders.
** NO RINGS, NO WATCHES!!
** Users with implanted medical devices should seek doctor's approval before welding, it's not usually a problem, but please do check
** The welder plugs into
*** Use only suitably rated industrial extension leads, they're in the desk drawer B1B▼
*** Extension leads are a trip hazard, warn people▼
▲** Use only suitably rated industrial extension leads, they're in the desk drawer B1B
▲** Extension leads are a trip hazard, warn people
** If something does go wrong, shut off power before anything else
|| Using the equipment without harming self or others
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* Clean up weld area - be aware of burning paint
* Clean area for earth clamp
*
** No bevel on thin materials
** Regular 2/3rds bevel most of the time
**
** Multipass and double sided welding are options
|| Proper preparation is necessary for good welds, cover bevel patterns for other weld types later
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** Resting your other hand on something to use as a guide
* How the pool forms (Only cover dip transfer)
* The pool wants to move, you need to just keep pace with it
* Keeping the wire aimed at the nose of the pool
** Further towards the tip of the pool = fast move, thinner bead, less penetration
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* Arc won't strike - Ground clamp not connected
* Weld moves around erratically - too much gas or influence from holding magnets
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| Butt joints ||
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** Flap discs will tidy up welds that are good to start with
** Grinding discs will remove messy welds quickly
* Shutting off the gas
*
* Sweeping up and putting everything back where it belongs
* Working out your total weld length and paying for it
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| Final thoughts ||
* This has only been an extremely brief over-view of MIG welding
* Do not expect your joints to be structurally sound or pretty until you have
* The sMIG feature is providing you a LOT of help on this welder, if you switch to a welder without sMIG you may find things a lot harder
* If you want to weld aluminium or magnesium alloys, Stainless Steel, Brazing or other techniques then you can look at [[Tools/TIG/induction#level2|TIG level 2]] or [[tools/mig/induction#level2|MIG level-2]] inductions although it's not compulsory to do level-2 inductions if you've already done the relevant level-1 inductions and if you think you can manage these techniques without further help
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|| Closing comments
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<div id="level2"></div>
== MIG Welder induction - Level 2 ==
Level 2 induction should cover more advanced uses
=== Main level 2 induction ===
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** But if your welds are structural or otherwise sensitive to contamination, don't use it
* Controlling weld distortion
** Metal pulls towards the heat source when it cools and so it pulls towards the weld and in the direction of travel
** You CANNOT prevent distortion, but you can control it.
** Extensive tacking and clamping will help reduce it a bit.
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*** Consider the directions of travel, that can provide a degree of compensation.
*** Subsequent welds on the same joint have diminishing effects on distortion because the other welds restrain it
*** Standard sequence for T-joint (alternating directions on opposite sides) and mitered corners. (
* Working with thin (1mm) and thick (5mm) materials
** For thinner materials heat control is vital, it's easy to heat the work up enough to cause massive distortion
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