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  1. #1

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    Build a magnetic stirrer ?

    Hi all. I would like to give this a try. I have the components : motor,magnets etc, but my lash-ups don't work. Has anyone looked inside one of these devices?
    I would welcome advice on the layout of the magnet/s inside the base.
    And, is the stirrer bar a magnet, or simply a steel bar?
    All information gratefully received.

  2. #2
    Dave Parker's Avatar
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    My Sidekick processor uses a "magnetic pill" stirring system, it is a iron pill that is activated when you start the processing, that spins the pill to keep the chems mixed, pretty simple system. You might get a hold of the guys at Phototherm, as they use this type of stirring system in many of their products.

    http://www.phototherm.com

    Dave

  3. #3

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    the stir bar is a teflon coated magnet.
    art is about managing compromise

  4. #4
    Dave Parker's Avatar
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    Quote Originally Posted by avandesande
    the stir bar is a teflon coated magnet.
    Could be, I thought they told me the one in my processor is iron, alls I know is it works.

    Dave

  5. #5
    L Gebhardt's Avatar
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    Last I looked you could get magnetic stirring hot plates for dirt cheap on ebay.

  6. #6

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    I was really talking about the ones you generally buy from chemical supply. Not sure about yours....
    art is about managing compromise

  7. #7
    glbeas's Avatar
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    The stirrers use a strong bar magnet on a rotor under the plate, usually one of the super strong exotic alloys. The stir bar is a smaller but similar magnet encased in plastic.
    Gary Beasley

  8. #8

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    What would one have to do to use a kitchen blender?

  9. #9
    glbeas's Avatar
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    You could engineer a bar to fit the motor shaft and a plate to sit on top of the unit. Most blenders go so fast though the bar would not be able to couple to the base magnet even at the lowest speed. It would likely just sit and vibrate.
    Gary Beasley

  10. #10
    JLMoore3's Avatar
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    Why not just use a kitchen blender for your mixing? I've been using one dedicated to the darkroom- works for me.
    John (Alpha Flying Monkey) Moore
    http://www.flyingmonkeystudio.com

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