Replies

1. 
   Guest_ | Sep 06, 1999 11:37pm | #1

   *

   Paul,

   A quick search of the site for "crown molding" should bring the formula up. It's been posted here a few times.

   Joseph Fusco

   View Image

1. 
   Guest_ | Sep 07, 1999 06:25am | #2

   *Paul, If you're like me, have your eight-year old help you with this one. Hope this is what you're looking for,MongoMulligan alert! ...previously deleted post is from me, I attached a .tif instead of .jpg file.

1. 
   Guest_ | Sep 07, 1999 10:29am | #3

   *Your Delta saw came with a table of these figures, and the Delta site has one too.This site needs a FAQ!!

1. 
   Guest_ | Sep 07, 1999 09:01pm | #4

   *Please cope the inside corners? The other thing to consider is that the ceiling and walls are probably not straight or level or at exact angles...have fun...And have it done by the end of the day...and put the furniture back where it was...and run the vacuum through, oh...and could you please use a chalk pencil! Hate my house messy! Oh and if you have time do the dishes and clean the toilets!

1. 
   Guest_ | Sep 10, 1999 10:59am | #5

   *Paul--I posted this exact question not long ago. Knew I'd read it in an issue of FHB sometime in the past. Barry O. was kind enough to look it up and post it for me.From the July '91 article, the Miter angle (M) is M= arctan(A/(C x tan(F/2))); the Bevel angle(B) is B= arcsin((D x cos(F/2))/C). In these equations, F is the angle of the corner (usually 90 degrees), A is the distance along the ceiling from the wall to the moulding, D is the distance along the wall from the ceiling to the moulding, and C is the length along the flat back side of the moulding (i.e., so A, D, and C form a right triangle, and the angle the moulding makes with the wall is arctan(A/D). Yeah, formulas usually don't get you perfect the first time (non-straight walls, misaligned saws, etc.), but they often get you close enough so that it's a minor tweak to get things looking good. Good Luck

2. 
   Guest_ | Sep 11, 1999 08:54am | #6

   *http://www.deltawoodworking.com/table/charts/moulding.htmlhttp://www.wwforum.com/faqs_articles/miter_formula.html

3. 
   Guest_ | Sep 11, 1999 08:57am | #7

   *They changed the delta address to;http://www.deltawoodworking.com/charts/moulding.html

4. 
   Guest_ | Sep 11, 1999 11:14am | #9

   *DAMN! I knew I should have taken that extra year of highschool math! Now I sometimes have to settle for the trial and error method.Pete Draganic

2. 
   Paul_Krause | Sep 11, 1999 11:14am | #8

   *
   I've been looking for the generic formula to determine the
   mitre and bevel angles to use on a compound mitre saw to
   cut crown molding flush on the table. My Delta came with a table
   for 45/45 and 52/38, but I've had used some crown that wasn't
   either config. I've seen the recommendations for mounting the
   molding upside down and using a cradle or clamping it at its
   natural angle, but that defeats the purpose of a compound saw.
   I have seen the formula published somewhere before, but can't
   recall where. Any help would be appreciated.