Use for: Probe, Home Z end stop, Z-offset.  My config for 3d printer with Eddy_NG: https://github.com/straga/3d_printer/tree/master/OpenQ1pro/config_eddy_ng/ or with what inside Klipper for BTT EDDY https://github.com/straga/3d_printer/tree/master/OpenQ1pro/config/