Best posts made by 2500ccm

@dc42 Sorry for my late reply. After i connected ground it worked well! Thanks alot

Hey i understand him. I think you want a switch for the different length of your nozzles. I am searching for the same thing.
https://forum.duet3d.com/topic/18106/tool-length-sensor-tls-for-e-g-tool-changing
This is a good way to start. He use parallel the bltouch. So it is a second z endstop.