inner grid melting problem
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byron addams
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- Joined: Thu Apr 01, 2021 5:16 pm
- Real name: byron addams
- Location: Whitby England
inner grid melting problem
what is the best way to make an inner grid? i have been soldering copper wire together to make them but i have been haveing problens with them melting.
Trying to keep the magic smoke from getting out.
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Richard Hull
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- Joined: Fri Jun 15, 2001 9:44 am
- Real name: Richard Hull
Re: inner grid melting problem
Search the large construction forum to find grid construction techniques. Simple soldering is no good. Even brazing (hard soldering) is no good. Spot welding is possible. Wire is usually tungsten in a real working fusor and never copper. Simple mechanical assembly is the norm with no welding or soldering using multiple single wire loops held like bunches of flowers in a hole bored in the long stalk.
Richard Hull
Richard Hull
Progress may have been a good thing once, but it just went on too long. - Yogi Berra
Fusion is the energy of the future....and it always will be
The more complex the idea put forward by the poor amateur, the more likely it will never see embodiment
Fusion is the energy of the future....and it always will be
The more complex the idea put forward by the poor amateur, the more likely it will never see embodiment
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byron addams
- Posts: 50
- Joined: Thu Apr 01, 2021 5:16 pm
- Real name: byron addams
- Location: Whitby England
Re: inner grid melting problem
would i be able to use one or those cheap spot welders that are for makeing batery packs or would i need one of the biger ones.
Trying to keep the magic smoke from getting out.
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Richard Hull
- Moderator
- Posts: 15037
- Joined: Fri Jun 15, 2001 9:44 am
- Real name: Richard Hull
Re: inner grid melting problem
I can't say I have never used a battery spot welder. I use a Raytheon vacuum tube spot welder made for spot welding thin metal and fine wire.
Richard Hull
Richard Hull
Progress may have been a good thing once, but it just went on too long. - Yogi Berra
Fusion is the energy of the future....and it always will be
The more complex the idea put forward by the poor amateur, the more likely it will never see embodiment
Fusion is the energy of the future....and it always will be
The more complex the idea put forward by the poor amateur, the more likely it will never see embodiment
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Bob Reite
- Posts: 579
- Joined: Sun Aug 25, 2013 9:03 pm
- Real name: Bob Reite
- Location: Wilkes Barre/Scranton area
Re: inner grid melting problem
I've used a spot welder made for making up dental braces. But it has to be "beefed up" to do tungsten. Since then I've switched to making cylinder grids with straight tungsten wire force fitted into undersized holes drilled in graphite end caps. Graphite is another material that can take high temperature, as long as it is under vacuum or a reducing atmosphere, which D2 qualifies as.
The more reactive the materials, the more spectacular the failures.
The testing isn't over until the prototype is destroyed.
The testing isn't over until the prototype is destroyed.