I was inspired by this bowl on Thingiverse but I wanted to design my own from scratch. I did it in Illustrator (I’ll put together an explanation if there’s interest) using the Transform effect, then cut it out of Baltic birch (I’d love to use Proofgrade but it wouldn’t work with the water). Then soaked the piece in water for about an hour, then put in between two bowls with a weight on top and let it dry for a few days. Glued the red beads between each outer arm. That was pretty challenging. I’ve got an idea about how to make it better next time.
Create a line with the pen or the line tool. With it selected, go to Effect…Distort & Transform…Transform menu. To make a spiral with 12 arms, I chose 6 copies with an angle of 30 degrees:
Change the Fill to None and the Stroke to black. Final result:
One thing I noticed is that the distribution of points is not even. Maybe it’s because I have a very old version of Illustrator and they have fixed this in recent versions–I have no way of knowing. But I found that I could fix some of it by, after doing Step 4 above, scaling up the figure as large as possible and rotating it about 15 degrees before doing the Expand Appearance in Step 5. Then I got this after Simplifying, which I think looks better:
