You can use the Q/A section in Github discussions. I converted your issue there. Can you share a reference to what you are trying to do?

This image shows what I've got so far. The pinion is the driver and the yoke is supposed to go up when the pinion revolves CW and stop after the last tooth of the pinion disengages. Then the pinion continues CW and engages the other side of the yoke and the yoke should move down to it's other disengage point.But, I haven't figured out how to get the yoke to reverse. (It may be I don't yet know the extent of the tools available in animation nodes. It may also be that the animation could be driven by frames and those control both the pinion and yoke. I'm looking for any input, as I'm new to animation nodes.
Peek 2022年04月21日 08-38
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The easiest way to do that would be to use a chain of animate nodes. See here for more information.

Essentially, we delay the input by 90 degrees (1/2 PI), then animate it from 0 to 1 for 90 degrees, then delay it again for 90 degrees, and finally animate it in reverse from 1 to 0 in 90 degrees. That means it will start at zero and stay zero for 90 degrees, then increase to 1 for the duration of 90 degrees, then stay at 1 for 90 degrees, then finally decrease to 0 in 90 degrees. We also repeat that for 360 degrees (2 PI) to make this animation infinite.