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  1. Greavis

    Have I got a magnetic challenge for you!

    David, that's great. I can use other magnets if necessary so I'll entertain what you said as well (where the poles are on the sides, not the length). Between all of the posts I should be able to put together something that works... thanks again!
  2. Greavis

    Have I got a magnetic challenge for you!

    IRstuff, as much as I'd like to discuss it all in detail I legally can't; not without NDA's, etc... which is why I've tried to describe the req's as in much details as possible. I'll look into the hard drive example as well (I never knew they were like that)... thanks again.
  3. Greavis

    Have I got a magnetic challenge for you!

    sreid, yes I saw them as well. I was hoping to find out something like "you need high permeability" or "high saturation foil with those magnets" so I could focus in on the foil and the design rather than spending $200 on a 6 pieces of foil where only one (hopefully) will suit me. But I...
  4. Greavis

    Have I got a magnetic challenge for you!

    Hello Prex, "Zero" for me would be if I put a piece of metal right on (or next to) the shield it won't be effected by the magnet at all. Whether that is really zero or some small value I don't know but that is the desired behavior. Why not wrap it all the way around? Well here is the theory...
  5. Greavis

    Have I got a magnetic challenge for you!

    That's what I'm talkin' about, IRstuff, thank you!
  6. Greavis

    Have I got a magnetic challenge for you!

    Prex, your points (again) are well taken -- some weakening is OK as long as one side is pulled in very close. Also, I updated the image as well. So, now that we are fully clear about the situation, do you have any ideas about why my previous solution didn't work? Do you believe it to be...
  7. Greavis

    Have I got a magnetic challenge for you!

    Prex, yes I understand your points clearly and, yes, the diagram should be more clear as well; the lines should be going through the shield, not repelled by it. My intent was to apply a shield to attract the magnetic field away from it's normal path and pull it in close to the magnet. The...
  8. Greavis

    Have I got a magnetic challenge for you!

    So, electricpete, in short it seems the shape of the shield is the issue. Yes, wrapping it in a "c" shape is allowed; as long as it still behaves like a normal magnet on the opposite side of the shield. IRStuff, perhaps this would apply as well since harddrives are completely enclosed within...
  9. Greavis

    Have I got a magnetic challenge for you!

    Hello, I'm working on a private project and I have (what seems to be) a simple requirement but I've run into some troubles. First, let me explain the requirement and then I'll explain what I've done and why (I believe) it isn't working. ### The requirement ### Given a normal magnet with a...

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