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The math of compound-angle joinery

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Blog entry by StLouisWoodworker posted 09-07-2014 06:09 PM 1896 reads 1 time favorited 3 comments Add to Favorites Watch

My friend, Bill Gottesman, and I recently finished writing a note about compound-angle joinery. The math behind the equations for setting up the blade and miter-gauge angles for compound-miter and compound-butt joints is developed. Writing it was our way to figure out compound-angle joinery. There may be simpler ways to do that, but this worked for us. Maybe it will for you too. But you have to have a strong stomach for lots of trigonometry. If you do, here is a link to the note, titled Compound-Angle Joinery.
http://dls-website.com/documents/WoodworkingNotes/CompoundAngleJoinery.pdf

-- Don Snyder (38.6N, 90.3W)



3 comments so far

View kaerlighedsbamsen's profile

kaerlighedsbamsen

1177 posts in 1174 days


#1 posted 09-07-2014 07:31 PM

That was quite a read. I ususally just go here for calculations that work.
Allways a pleasure to see when someone makses the effort and goes into a problem full scale. Thanks for sharing!

-- "Do or Do not. There is no try." - Yoda

View NormG's profile

NormG

5499 posts in 2465 days


#2 posted 09-07-2014 08:47 PM

That is a great note. Very interesting how you did this. Thank you

-- Norman - I never never make a mistake, I just change the design.

View robscastle's profile

robscastle

3392 posts in 1665 days


#3 posted 09-08-2014 09:29 AM

Well Don looks like you and Bill have produced a very comprehensive document.

I took a read and I have got to say It’s a bit, (read as way over my head) but I will have to again study it to see if I can understand it all.

-- Regards Robert

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