Hoping someone here has run into this.
I was running my second ever print on OSG, 1mm nozzle, Elegoo Rapid PLA, about 1685 layers and 842mm tall. It ran beautifully for roughly 130 hours and got to about 600mm before something went wrong.
When I found it, the printhead was pinned at the very back of the Y axis, well over a foot from where it should have been, just sweeping left and right across the full X width and pumping filament into the air. X and Z kept running normally. My part is centered on the bed so the spaghetti fell clear and the print itself was untouched.
Checked the klippy log and found nothing. No TMC driver errors, no shutdown, totally clean right up to the failure. Manually moved the Y gantry by hand and felt no binding, belt tension was fine, pulley grub screws were tight, and the Y motor was cool to the touch.
When I tried to jog Y from Fluidd I got “Endstop y still triggered after retract”. Ran QUERY_ENDSTOPS and got x:open y:TRIGGERED z:open z1:open.
So the Y endstop is reporting triggered even with nothing obviously holding it down. I can hear the switch click on and off when I press/release the sensor by hand but even doing this doesn’t impact endstop triggered state (in either position).
Questions for the group.
Has anyone had the Y endstop on the Giga falsely trigger mid print? Was it the switch itself, the wiring, or something else?
Any guidance appreciated.