On: Ditherpunk: The article I wish I had about monochr...

[aidenn0]

Anything controlled by a PID can easily end up in a circular pattern, so it's not a given that this was to avoid stiction.

[edit]

1 dimensional PIDs can end up in a sinusoidal dynamic equilibrium, and a 2 dimensional sine wave is an ellipse.

[HanyouHottie → aidenn0]

It's not an ellipse if the axes have different periods: https://www.wolframalpha.com/input/?i=x%3Dsin%28t%29%2C+y%3D...

(Is there a name for this kind of curve?)