2 weld machines, tig and mig, on same work at same time OK?

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I have a  boat project and am wondering if I can have 2 welders using 2 different machines welding on the boat at the same time?  One machine is an inverter fig, the other is a miller 350p aluminum.  I also have a trailblazer for  which can do fig and mig, but is not inverter based.So,  anyone know if 2 machines can run at same time welding the same work?Thanks, for any advise.j.
Reply:Why not?Been there done that many times.......zap!I am not completely insane..Some parts are missing Professional Driver on a closed course....Do not attempt.Just because I'm a  dumbass don't mean that you can be too.So DON'T try any of this **** l do at home.
Reply:Originally Posted by jcanton  I also have a trailblazer for  which can do fig and mig, but is not inverter based.
Reply:Make sure both aw well grounded to the piece.  Electrically, the welding arc is generated by and offset voltage from the ground.  The only place I could see an electrical problem is high frequency start going back into another machine.  I would assume machines are built to handle that back channel power.
Reply:I would try to think about the grounding situation, and have the work clamp for each welder near to the arc.   I don't think that I would want both welders to be grounded to the same point, but it might not matter.   Of course it is always a good practice to connect the work clamp near the arc.Generally speaking, welders, whether inverter or transformers types, use a transformer, small or large.   The transformer provides isolation from the AC power side.    The isolation is part of why multiple welders on the same boat should not be a problem.    If you think about a shipyard they clearly are going to have multiple welders going at the same time on the same ship.Sculptures in copper and other metalshttp://www.fergusonsculpture.comSyncrowave 200 Millermatic 211Readywelder spoolgunHypertherm 600 plasma cutterThermal Arc GMS300 Victor OA torchHomemade Blacksmith propane forge
Reply:Originally Posted by newburyWhat's fig? Flux core?
Reply:Thanks for the comments. And yes,  fig is a typo.  I meant fig.   I did learn something:  keep the ground close to the weld.  J.
Reply:I can't believe it!  I meant TIG , TIG, not FIG.  J.