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  1. 10th January 2012, 09:36 AM #1
    simonmags
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    Default Angled and Mitered - is it possible

    Morning All,

    My little pea brain is struggling this morning, I'm sure this must be possible but I;m struggling with the maths to work out the correct angles of cut.

    What I would like to do is make a simple(ish) little chisel box, normal 45 degree mitered corners for the most part. The only twist is I'd like the sides to fall in at about a 15degree angle.

    I started making a test piece out of ply last night, and the angles are close but the gaps are to large for decent glue joints currently.



    Any ideas on how to work out the correct angle of cut, or if this can be done?

    Cheers
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  2. 10th January 2012 09:36 AM # ADS
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  3. 10th January 2012, 10:43 AM #2
    HazzaB's Avatar
    HazzaB
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    Hey Simon,

    I have a project on the list, that requires the same or very similar sort of joins so I will be watching this thread with Interest.

    HazzaB
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  4. 10th January 2012, 12:28 PM #3
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    Gents,
    Try this link Woodworkers Guild of Georgia, Miter Calculator, otherwise just google compound mitre calculator.
    Ian..

    EDIT - According to the site linked above your angles are 10.55 and 45.99
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  5. 10th January 2012, 02:41 PM #4
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    munruben
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    Quote Originally Posted by Ian Smith View Post
    Gents,
    Try this link Woodworkers Guild of Georgia, Miter Calculator, otherwise just google compound mitre calculator.
    Ian..

    EDIT - According to the site linked above your angles are 10.55 and 45.99
    Good link Ian. If you haven't already done so, I would put the link up in the forum library.
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    Cheers John
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  6. 10th January 2012, 03:16 PM #5
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    Hi Guys,
    Here is a file I took off the Forum years ago.
    regards
    Billy
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  7. 10th January 2012, 03:17 PM #6
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    Quote Originally Posted by munruben View Post
    Good link Ian. If you haven't already done so, I would put the link up in the forum library.

    Munruben,

    Done! (in Conversions and Calculations)


    Ian
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  8. 10th January 2012, 03:42 PM #7
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    Hey Ian,
    FYI the Web Site is wrong, their own PDF download is the same as my Excel.
    regards
    Billy
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  9. 10th January 2012, 04:28 PM #8
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    Billy ,
    I deleted my post because I misread the info - the spread sheet refers to blade angle and the web site refers to mitre angle - They are both right.


    Ian
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  10. 10th January 2012, 07:38 PM #9
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    Billy's one is correct. I think there's a later version of it which also does coopering angles already in the forum library. If not, just do a search on the WWF for compound mitre spreadsheet.
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  11. 10th January 2012, 08:58 PM #10
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    If the dimensions are small enough, and/or your miter box is large enough,

    Cut the top and bottom bevels first. Set the board against the back wall of the miter box at its 15-degree angle, so that the bottom fits the base. Cut the normal 45-degree miter. Do all the right-hand ends, then reverse and do the left-hand ends; or vice-versa.

    This also works for cornice moulding.

    Cheers,
    Joe
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