Fix hair trigger on mig gun?

[454ragtop]

The trigger on my mig gun goes on if I so much as look at it sideways! Very annoying, it's constantly starting when I don't want it to. Not a cheap welder, it's a 250 amp Lincoln with digital controls, can't remember the exact model, but can obviously get it if it matters. I think it's a Lincoln Magnum gun? Anybody ever run into this? If yes, how did you fix it?
TIA, Jim

 

[Fcvapor05]

Don't touch the trigger?

They're supposed to be sensitive so that if you spend 10 hours a day welding you don't need the fingers of The Hulk on speed.

 

[454ragtop]

Nah, that's not it. I've used other migs, none were like this. If it's depressed as little as .015" it turns on.

 

[The Cobbler]

open up the gun and see if there's a metal tab that depresses the micro switch that you can tweak .

 

[454ragtop]

open up the gun and see if there's a metal tab that depresses the micro switch that you can tweak .

So I did just that. First pic shows welder in question. Next is gun with 1 cover removed. Third pic shows contacts after tweaking them, a little better but still too sensitive for my liking. Arrow in fourth pic shows what seems to be some sort of stop for the contacts. Tried thinning it a little, didn't seem to help. So I cut the stop out with a wizzer wheel. Much better, can actually move the trigger a little to turn it on. Would have preferred a little more trigger travel, but this will do.