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Electro magnetic fields
G'day folks,
I have a question for the electrics guy's. I recently had a defibrillator put in my left shoulder blade after a heart attack and now the quack said no more welding, I've been sent a link to a site that said they had done tests with the electro magnetic fields and found if you stay away from the machine itself it's ok and safe to use. My question is as follows is there the same field at the point where the welding rod or the wire from the mig contacts the parts being welded together, I would hazard to guess that a high frequencey tig may have one at the tip once you turn it on to start an arc. I don' particually want to find out by just going ahead and giving it a go because it is like being hit by a lump of 4 x 2 full swing or the same as when they use the paddles to revive some one. Bluebeard.
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John Finch |
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With respect to hf ac/dc tig there is quite a field to sensitive electronics, i once had a personal attack alarm 6' away from my tig torch go off every time i struck an arc. The question is if your defib is really that sensitive. Gas welding might be the way to go from now on! Hope your doing ok after the procedure a friend of mine had the same on 8th june.
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Paul |
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Tread very carefully here. Years ago Lincoln put cautions in their literature regarding keeping both work leads to the same side of the operator, i.e., to avoid putting one lead on either side of you as you weld, as that could put you inside an electromagnetic field.
This caution had nothing to do with pacemakers, just a prescribed procedure for all welders. Emfs are present, and stronger under certain work lead routing. Decades ago, I was taught the old SMAW (stick) technique of supporting the electrode lead by wrapping it around my arm or over my shoulder, no longer a recommended practice. Read here on page 5: https://www.lincolnelectric.com/asse...ature/E205.pdf
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Mark from Illinois Last edited by weldtoride; 06-13-2015 at 11:17 AM. |
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"If you have a pacemaker - Anything generating EM fields should be avoided.
TIG, Plasma Cutter, Induction Furnace.... MIG, stick arc ... All produce enough ElectroMagneticInduction to cause issues."
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Kent http://www.tinmantech.com "All it takes is a little practical experience to blow the he!! out of a perfectly good theory." --- Lloyd Rosenquist, charter member AWS, 1919. |
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But you can still do just about anything with a torch. Nothing wrong with Old School. I'm glad you are still with us,
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Scott in Montreal |
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To expand slightly on Kent's post, the simple fact that current is passing along a wire generates a magnetic field along the wire.
mjb
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Marc |
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