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[T3] Wire speed and MIGs


Yep, Toby,
	Find a good welding book.  Wire speed is pretty basic to migs.
(Metal-inert-gas welders)  You probably know it's just the rate at which
welding wire is fed into the arc.  
	It relates to welding current and gage of welding wire you're using.
Which, in turn, is sort of determined by the gage of metal you're
using!  That also determines how much gas you need to use to shield the
arc.
	It's pretty easy to set, actually.  My quick rule of thumb- if the
torch is 'bucking', i.e. you can feel the wire hit the bottom of the
weld, you're feeding too much wire.  If it's 'sizzling' (great big white
arc which extends from the tip of the torch to the base metal) you need
more.  The 'right' amount makes a nice crunchy sound, and the bead looks
good, i.e. not a big blob on top pf the base metal, and not undercut.
	However, if you've never migged, it's not too easy to set up a welder. 
Each parameter affects the others...  HP books has an acceptable welding
starter- I don't know offhand if anyone has one just on migs, but I bet
an online search would find at least a few.
	Get a mig and go nuts- it's fun!  (and horribly destructive unless
you're pretty good!)
Long winded answer,
Toby B
65 Notch that'll need LOTSA welding

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