Bushwacked Posted January 15, 2022 Share Posted January 15, 2022 (edited) I am trying to figure out how to do the math on this … I want to make a 20” circle not sure how to calculate length of each piece … I found this on a website to get the angle, but not board lengths … If you have 20 boards: 20 * 2 = 40 bevelled ends 360° / 40 = 9° each end should have a 9° bevel on it, so each end should be cut 9° from perpendicular: basically was going to make this: with mitered corners and then a plywood bottom that is inset with a rabbit. Figured it might be easier than gluing 10/4 boards together and hogging it all out Edited January 15, 2022 by Bushwacked Quote Link to comment Share on other sites More sharing options...
Coop Posted January 16, 2022 Share Posted January 16, 2022 20” diameter circle, right? If so, the circumference is 125.6”. Divided by 20 pieces, each would be 6.28” on the long sides. I wouldn’t trust that to get you to the moon but, it should be close. Quote Link to comment Share on other sites More sharing options...
Kev Posted January 16, 2022 Share Posted January 16, 2022 Look up "segmented circles" for turners.. I'm sure they have a program that dials everything in for you.. Something like this.. https://www.blocklayer.com/woodturning-segments.aspx Quote Link to comment Share on other sites More sharing options...
Bushwacked Posted January 16, 2022 Author Share Posted January 16, 2022 ah thanks .. didnt even think about that whole segmented turning group that has it down 1 Quote Link to comment Share on other sites More sharing options...
Coop Posted January 17, 2022 Share Posted January 17, 2022 My brother, who is an engineer, seems to think that each piece will be 3.142” long which is exactly half of what I predict. Let us know what you come up with. 1 Quote Link to comment Share on other sites More sharing options...
Kev Posted January 17, 2022 Share Posted January 17, 2022 9 hours ago, Coop said: My brother, who is an engineer, seems to think that each piece will be 3.142” long which is exactly half of what I predict. Let us know what you come up with. Seems that no matter how many times you cut them, they're still too short 🤪 1 Quote Link to comment Share on other sites More sharing options...
Bushwacked Posted January 18, 2022 Author Share Posted January 18, 2022 I’m an idiot … was prepping my miter gauge for cutting these and looked down… Didn’t even realize this was one there 😞. Now Coop I was getting lengths around where your brother was .. 1 Quote Link to comment Share on other sites More sharing options...
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