Skr-pro - Z course detectors

Hi, I run a primo with dual xy endstops
but for Z, I’m confused, what about wiring Z home/Z probe / Z endstop
How can I avoid my Z going down “forever” when homing from tft or cnc.js ?
Right now, I’m waiting for a chinese parcel with touchplate inside, for the moment,
I don’t know where to plug it…
I get a look at BIGTREETECH-SKR-PRO-V1.1/SKR-PRO-V1.1-Pin.pdf at master · bigtreetech/BIGTREETECH-SKR-PRO-V1.1 · GitHub
and in source code, this seems related to PG5 PG8
Maybe I don’t understand some things, my english is not so bad, but sometimes things are explained in such complex maner and I miss concepts :confused:

I don’t know what you ordered, but you can basically do this:

  • wire from zmin (-) to the bit. A magnet it nice here to male it easy to get on and off
  • wire from zmin (s) to a spatula on the work. Any metal plate of a known thickness will work.
  • verify that connecting them triggers in M119
  • G28 Z home (G38.2 Z in low rider dual endstop machines)
  • G92 Z(plate thickness) to offset the thickness of the plate.

If you have one of those button ones, it is the same idea. It works just like an endstop switch.

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