Ok … I got the big long table of all the miter and bevel settings for 52/38* and 45/45* crown moldings and the different wall angles … but what if one was simply interested in a basic 90* “corner” but the ‘crown molding’ was a 79/11*? Actually I’m bulding a mantle and one ‘level’ of it consists of a particular profile that I’m fabricating that slants out at 79* and I want to have a miterd 90* corner. There must be some sort of formula that one could feed the numbers into to come up with the miter and bevel settings for a basic outside 90* corner?
Thanks for any help …. long time no post
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I got this from Wayne Drakes crown molding book HD carries it. Miter angle of 10 degrees blade tilt of 42 degrees should do it.
Some good info with an all-purpose calculator:
http://www.altereagle.com/5_How_to_insta.html
Google Compound Miters by Rick Christopherson. Excellent method using simple trig. Good luck!
Here's the formula:
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You guys are great ... why do I stay away for so long? ... I've been wrapped up in work, taxes, my house, community skate park, blah, blah, blah, sorry. This is all TOO INCREDIBLE ... I majored in math in high school (Newport Harbor) and community college (Orange Coast) and in all those years I never comprehended an applicable use for all that BU(LS#)T about cosines, sines, and tangents! .... but I was really good at it! Maybe it's too bad wood shop teachers couldn't have been math teachers as well?! Nevertheless thank you all for your feedback!BKW
P.S. The spring salmon fishing out here on the Rogue is kicking in BIG TIME! If you get a chance you gotta come out here and check this out!
This just recently came up.
Check out this web site by Joe Fusco.
http://www.josephfusco.org/Articles/Crown_Moulding/crownscript.html
Here is a link to a calculator - all you have to do is enter your angles in and hit "calculate", presto, you get your answer.
You can plug in the 90 angle, the crown angle of 79/11 and you'll have your answer.
http://www.josephfusco.org/Articles/Crown_Moulding/CrownChart.html
Heres the link to a chart that will give you all the angles that you need, where to set your saw at..........All kinds of info on Joes site.
A plethora of information!
Doug
Thanks Doug! Joe FOOS is the man! Thank you all, again, for all the incredible input!Brad
Does no one use the fence and cut upside-down and backward? Angle is 45 regardless of the type of crown.
Maybe if I had a sliding compound miter saw...
That's how I cut it. Unless the crown is too large. Then I cut it flat.Mongo
Ok wise guy..show me the LEI E-8. That is purported to be as long as the Island of manhatten...256 dimensions, who'da thunk it?Inmate # 40735 At Taunton Federal Penitentiary.
Square Cut Fascia intersects Hip Rafter Calculator: works for crown molding as well. Select "Angle" mode, enter the spring angles in lieu of the "Main" and "Adjacent" rises and enter the wall angle in the "Total Deck Angle" field.
There are also links to drawings and formulas for crown molding.Joe Bartok
Uh...I would but...uhhh...I have some dovetails to cut!<g>
I spelled it bassackwards..here ya go.
http://aimath.org/E8/e8graphinfo.html and this page esp.
http://aimath.org/E8/
Inmate # 40735 At Taunton Federal Penitentiary.
Edited 3/23/2007 4:11 pm ET by Sphere
Does no one use the fence and cut upside-down and backward? Angle is 45 regardless of the type of crown.
That's the way I always do it! I honestly can't remember if I ever had a crown mold that was too big for a 12" chop saw.