Hello, I have this Chinise CNC for a wile and would like to "update it" with endstops - one for each axis.
My board is GRBL 0.9j and there is 3-pin inputs on it for each axis (see picture below).
I have no idea how to wire them to the switches and how to activate them in the software - Universal Gcode Sender (UGS)
Could You please give me some advice?
Thank You in advance
Best Regards