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Author Topic: Magnetic force and distance  (Read 23740 times)

Offline Honk

  • Sr. Member
  • ****
  • Posts: 497
Re: Magnetic force and distance
« Reply #15 on: September 05, 2007, 08:47:42 PM »
It does not increase. You have read the table backwards.

Offline ken_nyus

  • Full Member
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  • Posts: 229
Re: Magnetic force and distance
« Reply #16 on: September 07, 2007, 12:25:20 AM »
Ah, I get it now, 0 is the center point between the two magnets, and 0.625 is at the face of one of the magnets.

Thanks.

Offline ruin41

  • Newbie
  • *
  • Posts: 21
Re: Magnetic force and distance
« Reply #17 on: October 16, 2007, 04:31:01 PM »
Wow its good to see that there is information available these days ...there wasn't when i started on this stuff ... good to see the right questions being asked too.

If you want an easy way to figure out the "power" of a given magnet it is easy ... use your kitchen scales ...stick a magnet on them and push against it with another it reads pounds or kg ... simple enough to understand and accurate magnet strength comparison.

If you have the wall mounted plastic scales like i do then you can put a magnet in the bowl and test the pull power as well from underneath.

Offline Craigy

  • Sr. Member
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  • Posts: 255
Re: Magnetic force and distance
« Reply #18 on: December 01, 2007, 03:30:04 AM »
It is good to use the magnet sales calculator  http://www.arnoldmagnetics.com/mtc/calc_gauss_cyl.htm
when using a cheap Hall based Gauss meter, The a1301 or a1302 will normally saturate at more than a 1000 gauss, so if move to a point say half an inch away from the magnet under test we can calculate its surface flux value. The formula used on that page is this, Below that i have transposed so that you can work out your surface flux by taking a reading on your cheap gauss meter some distance away from the surface.



Offline Honk

  • Sr. Member
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  • Posts: 497
Re: Magnetic force and distance
« Reply #19 on: December 02, 2007, 01:00:29 PM »
This magnet calculator is better.
http://www.magnetsales.com/Design/Tools1.htm