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Thread: Centre Finder

  1. #1
    Join Date
    May 2006
    Location
    Lake Macquarie NSW Australia
    Posts
    402

    Default Centre Finder

    I have been making and using this as a centre finder.

    Use a drawing or paint program to draw concentric circles on a cross hair grid.

    Substitute Transparency film for paper and print.

    I have done this both using Laser and Inkjet Printers and have had good results.

    Make a few and discard when damaged.

    If you are careful they will last for years.

    Pierce the centre so you can use a pencil or compass point.
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  3. #2
    Join Date
    Oct 2002
    Location
    NSW
    Posts
    1,610

    Default

    I'll second that idea!

    I've used the clear top from shirt boxes, and my "Big 'Un" is the clear plastic lid from a kids toy from some Christmas long ago.

    I didn't bother with the CAD/drawing package, just tapped a nail in centre-ish, held the marker in place, and spun the plastic under the marker.

    Cheers,
    Andrew

  4. #3
    Join Date
    Oct 2006
    Location
    Tallahassee FL USA
    Age
    82
    Posts
    4,650

    Default

    Third from me. Vastly superior to the geometric bisector contraptions for irregular shapes, because you can visualise the final circular turning.

    Joe
    Of course truth is stranger than fiction.
    Fiction has to make sense. - Mark Twain

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