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Do mig welders hate magnets?

 
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232mako
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PostPosted: Wed Nov 10 10 2:26 am    Post subject: Do mig welders hate magnets? Reply with quote

Howdy all, I have a 110, 140 amp 100 % duty cycle snap-on mig welder that I have owned for over ten years and it welds like a dream up to ¼ inch metal, my question is when I use welding magnets to hold something in place the welder will spit sputter and the weld will only puddle on top of the metal, I did not make the connection until recently always thinking it was dirty metal or some snafu, but last week I was welding up a propane tank mount on the front of a friends trailer and every time I put the magnet to hold something the welder would start spitting and when it is removed it welded fine, just curious if anybody else has seen or experienced this perplexing phenomenon.
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Hell Fire Grill
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PostPosted: Wed Nov 10 10 5:25 am    Post subject: Reply with quote

Sounds like the magnet could be causing arc blow. Theres lots of information on google about it.
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232mako
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PostPosted: Wed Nov 10 10 7:24 am    Post subject: Reply with quote

Hell Fire Grill wrote:
Sounds like the magnet could be causing arc blow. Theres lots of information on google about it.


Thank Hell Fire Grill I am going to check it out, don’t know if there is anything I can do to fix it but it would be nice to know what’s up with that.

Take care.
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tacklebox
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PostPosted: Wed Nov 10 10 7:30 am    Post subject: Reply with quote

232mako wrote:
Hell Fire Grill wrote:
Sounds like the magnet could be causing arc blow. Theres lots of information on google about it.


Thank Hell Fire Grill I am going to check it out, don’t know if there is anything I can do to fix it but it would be nice to know what’s up with that.

Take care.


Remove the magnet Rolling Eyes Shocked Laughing

Seriously, move the magnet. I only use the magnets to hold things in place while I'm tacking. When you are done tacking, remove the magnet. Wink
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232mako
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PostPosted: Wed Nov 10 10 7:36 am    Post subject: Reply with quote

tacklebox wrote:
232mako wrote:
Hell Fire Grill wrote:
Sounds like the magnet could be causing arc blow. Theres lots of information on google about it.


Thank Hell Fire Grill I am going to check it out, don’t know if there is anything I can do to fix it but it would be nice to know what’s up with that.

Take care.


Remove the magnet Rolling Eyes Shocked Laughing

Seriously, move the magnet. I only use the magnets to hold things in place while I'm tacking. When you are done tacking, remove the magnet. Wink


Damn!! why didn't I think of that. Sad Laughing
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TrailerBuilder
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PostPosted: Wed Nov 10 10 9:28 am    Post subject: Reply with quote

I did a welding job for a buddy once that has a winery. He has some conveyors with powerful magnets that were ceramic coated. You could not get within 12 to 16 inches of it and the welds would start getting crazy. Just something with the magnetic field I figured. Key was, stay away from the magnets when welding!
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tiznutbrnt
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PostPosted: Wed Nov 10 10 9:41 am    Post subject: Reply with quote

Change polarity ??
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evil16v
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PostPosted: Wed Nov 10 10 9:56 am    Post subject: Reply with quote

YES!!! they do hate magnets. do enought to get a tack, remove your magnet, and weld. I had the issue with my slides for my racks. i just tacked and then moved the magnet and all was well.
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232mako
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PostPosted: Wed Nov 10 10 10:06 am    Post subject: Reply with quote

TrailerBuilder wrote:
I did a welding job for a buddy once that has a winery. He has some conveyors with powerful magnets that were ceramic coated. You could not get within 12 to 16 inches of it and the welds would start getting crazy. Just something with the magnetic field I figured. Key was, stay away from the magnets when welding!


TrailerBuilder

Thanks, that is defiantly some good advice. Smile
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232mako
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PostPosted: Wed Nov 10 10 10:30 am    Post subject: Reply with quote

evil16v wrote:
YES!!! they do hate magnets. do enought to get a tack, remove your magnet, and weld. I had the issue with my slides for my racks. i just tacked and then moved the magnet and all was well.


Before I made the connection about the magnet I was chasing a ghost in my machine always adjusting the heat or wire trim and a lot of head scratching, but thanks to you all the ghost is dead. Smile
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Teleking
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PostPosted: Thu Nov 11 10 3:01 am    Post subject: Reply with quote

tiznutbrnt wrote:
Change polarity ??


on what Question
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232mako
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PostPosted: Thu Nov 11 10 10:30 am    Post subject: Reply with quote

Teleking wrote:
tiznutbrnt wrote:
Change polarity ??


on what Question


Teleking

Thanks, perfect reply, I was drawing a blank.
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daddywoofdawg
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PostPosted: Thu Nov 11 10 1:24 pm    Post subject: Reply with quote

Magnet stick to metal,welding rod is metal rod wants to go to the magnet.
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wnkt
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PostPosted: Fri Nov 12 10 11:06 am    Post subject: Reply with quote

Electricity and magnetism are closely related...think ElectroMagnets
when electricity flows in a wire there is a magnetic field...so a stronger magnetic field can influence electric flow
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killswitch505
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PostPosted: Fri Nov 12 10 11:44 am    Post subject: Reply with quote

we build a lot of fences out of drill stem around here (and its only slightly magnetized) and it is way hard to weld probably the hardest thing I've ever had to weld
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ggarner
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PostPosted: Fri Nov 12 10 12:16 pm    Post subject: Reply with quote

I dont think changing the polarity will do anything, because you are running a DC machine. As was suggested earlier remove the magnets after you are done tacking.

Machines which run on DC current are pretty notorious for being subject to arc blow from either magnetized material or magnets near the welding site. AC machines do not experience arc blow nearly to the same extent, so if you have to weld near a magnet or on magnetized material the easiest way to overcome this is to AC stick weld it.

Another way to demagnetize material is to heat it up with a torch until its red hot and when it cools the atoms will reorient themselves in a more random fashion usually getting rid of the magnetism.
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