daveh55et
Computer
- Feb 5, 2007
- 19
I apologize if these are trivial questions. I have several books on order including Moskowitz.
I live in a tourist town with rocky beaches. I'm interested in using magnet assemblies for "treasure hunting". I expect to attach a line to the assemblies and drag them along a beach or from a pier.
I have the following questions:
I know that pole pieces attached to the magnetic faces of a block magnet can focus the field so that a 4 pound pull on each face becomes something like a 16 pound pull on the pole piece edges. Assuming "hardware store" cold rolled flat stock for pole pieces and I was considering making my own assemblies with ceramic or Neod magnets. Is there a very rough calculation that could give me pull values with pole pieces?
Should I enclose all but one side of the assembly for completion of the magnetic circuits and maximum pull?
Some assemblies like the one from Edmund Scientific seems to be design for a straight down, straight up process. In dragging or dredging it does not seem well designed as the line attachment point would leave the magnetic pull area sideways to the search surface. I think a cylindrical shape of some kind with an line attachment on the side would work better. Any suggestions for configurations to reasonably maximize surface area and dragging characteristics?
Thanks,
Dave
I live in a tourist town with rocky beaches. I'm interested in using magnet assemblies for "treasure hunting". I expect to attach a line to the assemblies and drag them along a beach or from a pier.
I have the following questions:
I know that pole pieces attached to the magnetic faces of a block magnet can focus the field so that a 4 pound pull on each face becomes something like a 16 pound pull on the pole piece edges. Assuming "hardware store" cold rolled flat stock for pole pieces and I was considering making my own assemblies with ceramic or Neod magnets. Is there a very rough calculation that could give me pull values with pole pieces?
Should I enclose all but one side of the assembly for completion of the magnetic circuits and maximum pull?
Some assemblies like the one from Edmund Scientific seems to be design for a straight down, straight up process. In dragging or dredging it does not seem well designed as the line attachment point would leave the magnetic pull area sideways to the search surface. I think a cylindrical shape of some kind with an line attachment on the side would work better. Any suggestions for configurations to reasonably maximize surface area and dragging characteristics?
Thanks,
Dave