@spllg said in Weird fault on homey.g:
as a side note regarding duet 3 (6hc): when an end switch - let's say y (active low) is disconnected for some reason and i try to home y the printer hangs - no motion related commands are accepted afterwords until it is reset by power cycling duet + raspberry (emergency stop, reset, and (at least sometimes) a reset of the hc6 does not unhang the printer).
Unplugging a Normally Closed switch (the switch pulls the pin to ground when NOT triggered) is equivalent of a broken wire. This should, and does, cause the switch to "look triggered all the time" and the machine will not move on a homing sequence.
It shouldn't hang like you describe... although, I've noticed similar hangs when homing moves don't complete on D3+Pi. Reset the firmware does not fix it, which makes me assume the Pi is still 'out-of-sync' waiting for that move.
I have not taken the time to see if stop/start of either of the Duet services fixes it.
Summary: I've seen the same hangs. I will start a new thread to report this as a bug.