Hawk Posted March 28 Report Share Posted March 28 In an effort to expand my scrolling activities I picked up Carole Rothman's book "Scroll Saw Wooden Bowls". The one my wife picked out calls for ⅝ stock. The rings are cut at 23 degrees. Now I'm wondering if I go with ¾ stock would the 23 degree angle cut still apply? If not what would I change to. The reason for ¾ as opposed to ⅝ is a drum sander is still on my wish list and I don't seem to be able to find ⅝ stock. Everything is either ½ or ¾. Chris OCtoolguy 1 Quote Link to comment Share on other sites More sharing options...
OCtoolguy Posted March 28 Report Share Posted March 28 I've done a couple of her bowls and when I had questions I'd email her. She's very good at answering. This one was designed to be 7" but I wanted to make it bigger and add a ring so I wrote to get her opinion. Hawk and preprius 1 1 Quote Link to comment Share on other sites More sharing options...
don in brooklin on Posted March 28 Report Share Posted March 28 The angle will change. You can calculate the angle here https://www.scrollmania.com/ This is from Carole at SSW Now, down to business. If you go to Dave's program (AngleCalc), enter the thickness of your wood as a decimal. Then, enter the ring width, also as a decimal. Go to where it says "angle" and click on "solve". The correct angle should appear. Round the number up, if necessary, and add one degree. That should work. However, to play it safe, send me a PM with your specs and I'll compute it for you. That way you can check your own work, and not risk ruining your wood. preprius, Hawk, Dave Monk and 1 other 2 2 Quote Link to comment Share on other sites More sharing options...
Hawk Posted March 28 Author Report Share Posted March 28 Ok I'm not real savy with the tech stuff. @OCtoolguyand @don in brooklin on, where would I find Carole's email? OCtoolguy 1 Quote Link to comment Share on other sites More sharing options...
JTTHECLOCKMAN Posted March 28 Report Share Posted March 28 https://scrollsawbowls.blogspot.com/2015/07/an-easy-way-to-figure-out-cutting-angle.html Hawk, OCtoolguy and preprius 2 1 Quote Link to comment Share on other sites More sharing options...
OCtoolguy Posted March 28 Report Share Posted March 28 49 minutes ago, Hawk said: Ok I'm not real savy with the tech stuff. @OCtoolguyand @don in brooklin on, where would I find Carole's email? scrollsawbowls@yahoo.com Hawk 1 Quote Link to comment Share on other sites More sharing options...
preprius Posted March 28 Report Share Posted March 28 I had to calculate each ring for this hollow football. I had to look up math equations..tangent and arc tangent. I Used a calculator that had scientific trig functions. I don't recommend excel or similar. Best to use Dave angle tool. The easiest is what JTCLOCKMAN showed. OCtoolguy 1 Quote Link to comment Share on other sites More sharing options...
barb.j.enders Posted March 28 Report Share Posted March 28 9 hours ago, JTTHECLOCKMAN said: https://scrollsawbowls.blogspot.com/2015/07/an-easy-way-to-figure-out-cutting-angle.html I didn't know she had a blog. Thanks for sending me down that rabbit hole OCtoolguy 1 Quote Link to comment Share on other sites More sharing options...
scrollerpete Posted March 28 Report Share Posted March 28 With the angle calculator to make the bowl with a piece of wood 3/4” thick and ring at 3/8” wide the angle will be 26.6 degrees. I will suggest that if you use hard wood, go easy DO NOT push the blade too hard because that will change the angle and the sanding will take quite a bit of work. P.S. Carole does not call it sanding but shaping it does not sound as bad. LOL Hawk and OCtoolguy 1 1 Quote Link to comment Share on other sites More sharing options...
Denny Knappen Posted March 28 Report Share Posted March 28 Dave VanEss's site is a good source for calculations. OCtoolguy and Hawk 1 1 Quote Link to comment Share on other sites More sharing options...
Hawk Posted March 28 Author Report Share Posted March 28 (edited) Thanks to @JTTHECLOCKMAN, the blog answered exactly was I needed. And yes @barb.j.enders, that is quite a blog and rabbit hole (lol) Edited March 28 by Hawk OCtoolguy and barb.j.enders 2 Quote Link to comment Share on other sites More sharing options...
meflick Posted March 29 Report Share Posted March 29 Carole also participates on the Scroll Saw magazine’s forum and will answer questions there too. https://forum.scrollsawer.com Hawk and OCtoolguy 2 Quote Link to comment Share on other sites More sharing options...
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