Cutting a Circle with a Router and Circle Jig

The circle and straight line illusion shows how surprisingly different motions can produce the same visual pattern. Imagine several dots moving back and forth along straight lines that all pass through the center, with each line rotated by a slightly different angle. When the dots move with carefully chosen timing, your brain stops seeing them as separate objects traveling along straight paths. Instead, the dots appear to organize themselves into a smooth circle that rotates or rolls through spa