OK here’s the sitchyayshun..
we be putting up some 6-5/8″ crown.
45∘spring angle, to wide/tall to cut standing up.
PLUS!!!
we gots bullnosed corner bead, so we are putting in a small 45∘piece to go around the outside corners.
so when I figure my bevel/miter settings I am using the line in the tables for 135∘corners?? NO??
My Bosch angle computer gives the same miter/bevel angles as the charts, but when I cut the three pieces and put them together they go together nice but form about a 93∘corner.
I brought some crown to my shop and tried it on my saw and got the same results.
Wherefore art I screwing up??
be befuddled…
thanx…
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“After the laws of Physics, everything else is opinion”
-Neil deGrasse Tyson
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If Pasta and Antipasta meet is it the end of the Universe???
Replies
Maybe the spring angle is not 45.
THE 135* corner for the cuts should be right.
Checked it a bunch of times.....
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"After the laws of Physics, everything else is opinion" -Neil deGrasse Tyson
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If Pasta and Antipasta meet is it the end of the Universe???
Kinda figured you had checked but had to throw it out there.
TFB (Bill)
Just curious. How did you check the sping angle?
One way would be to make 2 45° cuts with the miter/bevel set to 35.26/30 and see if the result makes a perfect 90.
to check the spring angle I sliced a chunk off square and est it inside a framing square and checked the fit and even put my speedy square on the back side to check..
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"After the laws of Physics, everything else is opinion" -Neil deGrasse Tyson
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If Pasta and Antipasta meet is it the end of the Universe???
T
This was getting to me this morning so I went to work and played around with it some.
When I get stuck like this I take a scrap piece of wood and make myself some "easy crown" - I took a piece of wood and bevel cut 45's on both sides thus making a 45 crown that is small enough to fit in the miter saw both laying down and standing up.
I cut the miters for a simple bullnose corner standing the easy crown up in the miter saw the traditional way, made my cuts and set those pieces aside.
Then I took my Bosch angle finder and found the miter/bevel that I need to lay the crown down, which is the only way that I cut crown.
I set the Bosch to 45 for the spring angle and then pushed the black button to get my miter and bevel. When I did this I set it to 135.1 cause it was close enough and my numbers came up 16.3 and 15.7 which is probably close enough for these cuts(as I said I set the angle finder to 135.1 cause as you know the damn thing is so finicky that honing in on that last little 1/10 of a degree is a pain in the a$$!)
I laid the easy crown down on the miter bed and made my cuts per the Bosch. My results were dead on to what the cuts were standing the crown up.
Here is a few pictures of what I got as a result. Two identical sets of crown moulding that would fit a radiused corner.
I know you probably already figured this out but I didn't go through all this shid at work for nothing ya know, my boss has to see something for his money for Gods sake!
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Here is a pic of the two sets of easy crown stacked on top of each other, I glued them together pretty fast but they do mirror each other, or close enough for gov'ment work.
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Doug
Edited 7/15/2008 9:40 pm ET by DougU
So, did you figure out what's happening with those angles yet?
Tanks for all the help.I think between the uniform non-uniformity of MDF, the inability to accurately set fractions of ∘s and me not being familiar with the saw (Makita DBSCMS). I just had to fornicate the
angles a little til it fitted gooder.plus it being 90∘ and 800% humidity wasn't helping.The joints came out acceptable, not my best but definitely paint grade...One thing I don't like about cutting big moldings on the flat is when you need to tweak a fit just a skoch you have to stop and figure out how you want to move BOTH settings and it is not always clear how the new cut will affect the fit.after 10,000 joints I may get the hang of it......
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"After the laws of Physics, everything else is opinion" -Neil deGrasse Tyson
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.
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If Pasta and Antipasta meet is it the end of the Universe???
The Delta 12" DCMS cuts up to 7-3/4" crown "bedded" in position (the pic is 6-1/2" crown). Makes "tweaking" easy.Did you see how I did the crown on bullnose corners last month (wire lath & plaster)?
That would be fun to try!!A while back either JLC or FHB had an article where a guy made plaster casing on a elliptical window..
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"After the laws of Physics, everything else is opinion" -Neil deGrasse Tyson
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If Pasta and Antipasta meet is it the end of the Universe???
That is a FHB article...I've got a reprint of it in a Taunton "Best of Trim Carpentry" book, here somewhere.I found pics of crown done this way at the JLC trim photo gallery. It was a fun project.Cheers,Brian
RTFM
RTFM
Recommend T Fudge Miters???
IGTASOOTFM.
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"After the laws of Physics, everything else is opinion" -Neil deGrasse Tyson
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.
.
If Pasta and Antipasta meet is it the end of the Universe???
I'm still working on that one.Got it fudged in yet?
IGTASOOTFMI got to ask someone on oats toss freakin manual?
you got 2 on either end....
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"After the laws of Physics, everything else is opinion" -Neil deGrasse Tyson
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.
.
If Pasta and Antipasta meet is it the end of the Universe???
4 11/16" high cut.... get a bigger saw.
check that spring angle again.
I am pretty confident of the spring angle.It is a stock MDF molding.it as a big symmetric cove with little ogees on either edge.it is called symmetric crown in the MM catalog...gonna have to get fudgy on it today...that didn't sound right....
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"After the laws of Physics, everything else is opinion" -Neil deGrasse Tyson
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.
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If Pasta and Antipasta meet is it the end of the Universe???
I hold a masters degree from the University of Fudgit so yeah...do it so it's right and looks good and don't question the Off-Angle Gods. They must have their day and we must allow for that.
"...they go together nice but form about a 93∘corner."
So you're 3° off in 4 cuts, two from each side, or are you flopping the pieces over so you can use just one setup?
If you're cutting from one setup, an error of 3/4° would give you 3° combined error in 4 cuts.
Since you got the same result on two saws, it seems unlikely that you are making the exact same setup error twice.
If you are flopping the stock over and using one setup, a difference of thickness of the stock from one edge to the other could make the angles come out different for those cut face side up versus those cut face side down, couldn't it?
This makes the most sense so far.angles of 15.7∘bevel and 16.3∘miter8 angles actually the miter angle scale is pretty easy to gage a 1/3 of a degree on, but on the bevel scale the lines are as wide as the spaces and the pointer is to far off the surface, inducing a parralax problem.makes me think I just have to fudge with it till it fits...>>contemplation/rant<<they can make telescopes and astronomy equipment that can measure hundreths of a second of arc over 10's of thousands of light years. but I cant set a saw to a 1/4 of a degree...<<"moment" over>>the phrase "can't see it from Andromeda" may have significance here....
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"After the laws of Physics, everything else is opinion" -Neil deGrasse Tyson
.
.
.
If Pasta and Antipasta meet is it the end of the Universe???
we gots bullnosed corner bead, so we are putting in a small 45∘piece to go around the outside corners.
so when I figure my bevel/miter settings I am using the line in the tables for 135∘corners?? NO??
This is where I'm having some problem understanding.
You got bullnose corners so are you making the crown miters 22 1/2 on the two adjacent walls with a short little piece in the middle? Like in the picture?
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Maybe I'm just not getting/understanding the problem???
Doug
Edited 7/14/2008 11:04 pm ET by DougU
yes just like that..
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"After the laws of Physics, everything else is opinion" -Neil deGrasse Tyson
.
.
.
If Pasta and Antipasta meet is it the end of the Universe???
T
If its just like the picture, then without the aid of my Bosch angle finder, I'd say that you put the wrong no's into the thing. You only want to go to a 22 1/2 for your cuts. Set the Bosch to represent that type of wall if that makes sense?
Maybe thats what you did, not sure, I will have to try it at work. Were doing a house with 6 1/2" crown right now too and I know that we have some outside walls at 45 angles, or 135, either way I know that I punched the no's into my bosch and came up with the right settings for my saw.
Have to try this and see what gives! Of course that dont help you this morning.
Doug