After working flawlessly for over a year suddenly my X and Y endstops are showing triggered after the first time they are tapped post power on. I have been looking everywhere for a solution to this, but can’t find anything. It’s almost as if something is getting stuck in the Nitehawk mcu. I’ve tried firmware restarts, resetting the nitehawk and flashing the latest klipper firmware to no effect. If I hard power off and on the machine they will come back as open till they are triggered again and remain stuck from that point.
I have been through this, and I apologize as I forgot to state that this printer has been functional for over a year. It was printing fine one day and I went to start a new print the next and this failure started. My first thought was a switch problem but they check out with a multimeter. Also double checked the cable. The really weird part is that is comes up ok on power on, and only seems to get stuck on first home. Individual axis will appear to home ok if done seperately but not if done with home all, but shows triggerd after regardless of method.
Can it be that 5v (or 3.3v) rail of the board is pulled to low somehow making it think it’s triggered? I don’t know if you trigger at low or at high ( I trigger at low for fail safe purposes)
Klipper on MCU (Manta M8P) is v0.12.0-463-gfb91aad58
Klipper on nhk (Toolhead) is v0.12.0-463-gfb91aad58
It appears to me that you updated your “PI 4” (which I presume is actually a CM4) but didn’t update the firmware on the two MCUs and I suspect that this is causing your problems.
I suggest that you update your Manta M8P and LDO Nitehawk SB to the same Klipper level as your Host. There’s a good chance that your problems will go away.