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04-03-2019, 08:01 AM
(This post was last modified: 04-03-2019, 08:06 AM by Cooler.)
Is there any way to calculate the angles for this star? I'd like to make a large one for indoor use out of 3/4" MDF using just glue to assemble it. I was good at geometry in high school but it was nearly 60 years ago and this is pretty complex. I can figure out the angles for the points and interior corners of the star (as if it were a flat piece).
But how to figure the angles for the 3D depth?
It seems like a pretty easy project once the angles are finalized. Just cut, glue and tape (for clamping), and then paint.
![[Image: generous.jpg]](https://cdn1.ykso.co/destinationhome/product/barn-star-24-inch-metal-indoor-rustic-farmhouse-americana-hanging-dimensional-shabby-chic-distressed-wall-d-cor/images/c9f3c91/1551197276/generous.jpg)
I can easily make one of these, but it is not what I want. And I want the star to cover a large area of the wall about 36" across.
![[Image: il_340x270.1442743226_m8rm.jpg]](https://i.etsystatic.com/8867843/c/1040/826/96/131/il/2e9fa7/1442743226/il_340x270.1442743226_m8rm.jpg)
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04-03-2019, 08:14 AM
(This post was last modified: 04-03-2019, 08:15 AM by mad_planter.)
(04-03-2019, 08:01 AM)Cooler Wrote: Is there any way to calculate the angles for this star? I'd like to make a large one for indoor use out of 3/4" MDF using just glue to assemble it. I was good at geometry in high school but it was nearly 60 years ago and this is pretty complex. I can figure out the angles for the points and interior corners of the star (as if it were a flat piece).
But how to figure the angles for the 3D depth?
It seems like a pretty easy project once the angles are finalized. Just cut, glue and tape (for clamping), and then paint.
http://lmgtfy.com/?q=calculate+angles+for+3d+star
this site has a xls file to calculate them:
https://www.lumberjocks.com/Aggie69/blog/33374
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Draw it in SketchUp and measure the angles.
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Will also need what is the depth to figure the compound miters . Roly
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04-03-2019, 10:21 AM
(This post was last modified: 04-03-2019, 02:28 PM by FS7.)
There should not be any compound miters. You might be overthinking it.
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04-03-2019, 11:12 AM
(This post was last modified: 04-03-2019, 11:14 AM by Arlin Eastman.)
I am pretty sure since I do wood turning it goes all by 360 degrees.
You have 5 points with 2 sides which = ten sides
So 360/10=36 degrees each side
As of this time I am not teaching vets to turn. Also please do not send any items to me without prior notification. Thank You Everyone.
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Like Phil, I'd model it in SketchUp to get the angles. Precise without calculations.
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Thanks for the video links. I think I have enough to start figuring out the angles. I will make a small one to test my math, then the large one. Should be fun.
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News to me that these days, every woodworker uses Sketchup, or knows how to use it!
Simon
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(04-03-2019, 11:42 AM)Cooler Wrote: Thanks for the video links. I think I have enough to start figuring out the angles. I will make a small one to test my math, then the large one. Should be fun.
That looks like a great project. I'm math challenged, so please post the result, and the measurements, when you are done. I'd love to make one.
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