@sinned6915 said in Help- Marlin convert: Dual endstops & LCD Menus:
.........................I am leaning towards wiring the other 3 switches in series, NC, so that if one of them trips, the condition is set. I really want this for stopping the printer from crashing the carriage out of bounds resulting from missed steps/layer shifts-hangs-hiccups-whatever................
That's how I have my machine configured. As @Phaedrux says, once homed any moves will respect the axes maxima but I tend to do stupid things from time to time, so having additional switches can be useful. In my case I use a spare end stop on the Duex5 (E4) and connect the 3 switches wired in series to that. So any one opening will cause the trigger to happen using this command in config.g M581 E4 S1 T0 C0. The E4 is the end stop number, S1 means detect rising edge, T0 means do an emergency stop like M122 (but you can take other action or call your own macro), and C0 means any time (using C1 means only when printing from SD card).