Coarse and fine home implementation. Are there any tutorials?

I have a lathe wired with a set of coarse and fine home positions. I am looking at how to implement them into LinuxCNC. I saw and example from JT where he had implemented it in his finished code, but I couldn't discern how it actually worked.

In general, when the go-home button is pressed, the machine moves at speed 1 until coarse button is hit then move at speed 2 until fine button is hit, back off and consider that 'home'. Or at least that is what I think it should do.

I know how to write it out in psudeocode, but am struggling in the actual code and as this could damage the machine, I would rather follow some example. I am thinking to do it in ladder, but I don't have a good grasp of how to govern motor motion in ladder yet.

Ah, now I got to find where I found the coarse and fine pins. I got it wrong. This was the JT one of configurations I was following along, but it seems like it didn't have the coarse and fine pins. I'll do more digging.

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