Page 1 of 2 12 LastLast
Results 1 to 10 of 11

Thread: A question about rounding(arc) a tables sides

  1. #1
    Join Date
    Mar 2008
    Location
    new york city burbs
    Posts
    10,188

    A question about rounding(arc) a tables sides

    The top of the coffee table is 26x44.
    I want to leave the ends straight, but want to arc the long sides from 26 at center, to 23 at ends. Tapered in 1.5 inches from end to center.
    Basically, I want the sides to arc outwards from end to center.

    Following several methods, I was getting discouraged how long a radius Id need to draw it out.

    I waited for my son, graduated cum laude double major mathematics and computer science, figured hed have the formula.(once in a blue moon his education comes in handy)
    He did, I needed something like a 162+ radius to generate such a small arch of 1.5 inches over 44 inch total.(unless ofcourse he used the wrong formula, not sure myself)
    Just way too much for me.
    Any other ideas other than just try to free hand one jig and make all four sides the same?
    Last edited by allen levine; 11-19-2009 at 12:44 AM.

  2. #2
    Join Date
    Oct 2006
    Location
    ozarks
    Posts
    4,993
    spring a batten on scrap mdf, cut close with a band or jig saw trace on another scrap then reverse and trace again. cut and sand to line and use for a router template.
    [SIZE="1"] associated with several importers and manufacturers.[/SIZE]

  3. #3
    Join Date
    Oct 2006
    Location
    somewhere east of Queen Creek, AZ - South East of Phoenix
    Posts
    8,529
    Take a piece of scrap a litthe over 44", rip a thin piece on your TS. Measure down 2 inched from the side on either end. Anchor the end of the piece to the top bend the piece till the middle reaches the edge. trace your line, wash rinse and repeat.
    Attached Thumbnails Attached Thumbnails Arc.jpg  
    "There’s a lot of work being done today that doesn’t have any soul in it. The technique may be the utmost perfection, yet it is lifeless. It doesn’t have a soul. I hope my furniture has a soul to it." - Sam Maloof
    The Pessimist complains about the wind; The Optimist expects it to change;The Realist adjusts the sails.~ William Arthur Ward

  4. #4
    Join Date
    Oct 2009
    Location
    Bradford, Vermont
    Posts
    425
    In short, "trace a fair curve" (see also).

    Or... just find a 324"-diameter coffee can lid to use as a template.

    162" radius is correct, by the way.
    -- Tim --

  5. #5
    Join Date
    Apr 2007
    Location
    No, not all of SoCal is Los Angeles!
    Posts
    9,076
    Fairing stick:
    Attached Thumbnails Attached Thumbnails fairing 002.jpg   fairing 003.jpg   fairing 004.jpg   fairing 005.jpg   fairing 006.jpg  

    a_faringsticksm.jpg  
    Any sufficiently advanced technology is indistinguishable from magic.
    - Arthur C. Clarke

  6. #6
    Join Date
    Mar 2008
    Location
    new york city burbs
    Posts
    10,188
    so tod , don, and glenn, basically a batten, scrap or fairing stick, is just about the same thing, and I have a trim bit with guide, probably much more accurate for me to get close than just cutting close and sanding.(I have enough mdf to make a router template)
    Thanx...Ill give it a shot tomorrow morning.
    Last edited by allen levine; 11-19-2009 at 03:16 AM.

  7. #7
    Join Date
    Oct 2009
    Location
    Bradford, Vermont
    Posts
    425
    You can even stitch down the fairing stick with hot glue in several places, then hot-glue down some glue blocks here & there to give it more strength for that trimming pass with the router.
    -- Tim --

  8. #8
    Join Date
    Oct 2006
    Location
    ozarks
    Posts
    4,993
    the reason i suggested making a pattern and reversing it is because it`s really dificult to find a piece of wood that will spring evenly along it`s length.
    [SIZE="1"] associated with several importers and manufacturers.[/SIZE]

  9. #9
    Join Date
    Apr 2007
    Location
    No, not all of SoCal is Los Angeles!
    Posts
    9,076
    Quote Originally Posted by tod evans View Post
    the reason i suggested making a pattern and reversing it is because it`s really dificult to find a piece of wood that will spring evenly along it`s length.
    Tod is quite correct (no surprise there ). I use the fairing stick to get a general curve on my template material. I then cut close to the line on the bandsaw and sand to my final shape. After use I drill a hole in the template and hang it on the wall because as soon as I get rid of it, I'll want it again .
    Any sufficiently advanced technology is indistinguishable from magic.
    - Arthur C. Clarke

  10. #10
    Join Date
    Dec 2006
    Location
    Bellingham
    Posts
    2,449
    Quote Originally Posted by tod evans View Post
    the reason i suggested making a pattern and reversing it is because it`s really dificult to find a piece of wood that will spring evenly along it`s length.
    Ok, I get what you were saying now. Only spring one half of the arc, flip that board to mark the other half and you now have a template for the full arc that is equal in appearance, from midpoint to each end.

    Thanks for the tip!

Similar Threads

  1. So Calif fire on three sides of me
    By Jim C Bradley in forum Off Topic Discussion
    Replies: 27
    Last Post: 05-20-2014, 03:24 PM
  2. New way of rounding corners...
    By Roger Tulk in forum Neander Tool Questions and Show & Tell
    Replies: 6
    Last Post: 10-24-2012, 02:37 AM
  3. Edge rounding / cornering plane or tool
    By Dave Black in forum Neander Tool Questions and Show & Tell
    Replies: 11
    Last Post: 01-10-2012, 04:12 PM
  4. Rounding over
    By Syd Lorandeau in forum General Woodworking Q&A
    Replies: 12
    Last Post: 07-01-2009, 08:46 PM
  5. Corner Rounding Jig
    By Vaughn McMillan in forum Jigs and Fixtures
    Replies: 9
    Last Post: 12-31-2006, 03:58 AM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •