Determining angles for a compound joint
Hi. I am building a cradle and all 4 sides are splayed out from vertical. I drew up plans based on a photo of one that I liked however I’m at a loss as to how to determine the compound joints for the 4 corners. It will be a butt joint (dowel or biscuit reinforced) and I can figure out the angle if one side was vertical but since neither is I’m not sure how to go about figuring this out. I can simply keep cutting scrap until I get it to fit but I’d prefer a more accurate and less wasteful method. Any tips, help or web site references you can point me to?
Thanks
-Gary
Replies
Check out http://www.newyankee.com/getproduct3.cgi?604 for plans and some inspiration.
Regard it as just as desirable to build a chicken house as to build a cathedral.
Frank Lloyd Wright
Thanks. The one I'm modeling mine on is the cradle that Bob Requarth has in Design Book Seven. I hunted down a way to contact him and discussed the design with him for quite awhile. He was very nice and quite helpful with some pointers and suggestions.
-Gary
Gary,
There is the engineering drafting approach of laying out your project in scale or full-size end, side and top views and then measuring the angles. The other way is to reference a compound angle table or calculate it. Attached are three sources for the latter two solutions.
http://www.woodcentral.com/bparticles/miter_formula.shtml
http://www.cabinetmaking.co.uk/compoundangles.htm
http://www.installcrown.com/Crown_angle_generator.html (This generator is helpful for those us who have long forgotten our trig)
Good luck with your project.
Doug
These will work great! Thanks.
I already have created full size plans so I can pull the angles off those and use that third web site to get the settings that I need.
-Gary
Please post the final project in the Gallery. Do you plan to bild a crib next?
I haven't thought that far ahead. Our daughter is due in Feb (this will be our first grandchild) however since I work in the garage (in Chicago) I need this done by October in order to get a finish on it while the weather is still good. She doesn't know what it will be yet so I still have time to think toy trains/trucks or a doll house too.
What fun! I have build cribs, large chests of drawers and a trundle bed for our 2 grandchildren and they can keep you busy with projects for years to come. Enjoy.
Here is a web page with some general purpose calculators for compound angles I did for my woodworking club. It exhibits a 6 sided bird house and 8 sided squirrel feeder. But the approach should work for a 4 sided cradle just fine. A cradle just contains a different (more troublesome) kind of critter!
http://www.writely.com/View.aspx?docid=bcfvz5kk9d6xw
Jerry
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