I have a Lulzbot Mini (version 1), running Marlin 18.104.22.168. I can’t get past autolevel for the life of me. Octoprint always reports the Mini fails with “Error: Probing failed”.
When this happened in the past, I would clean the print head with isopropyl alcohol on a paper towel and successfully try again, but now it won’t get past the probing.
The printer attempts to probe all 4 corners, and only after touching the last corner does it stop and return the error. It does not crash into the washers, so it looks like it’s making electrical contact. It does not attempt to wipe the printhead and start again; it touches the 4th washer, lifts up, then returns the error and Octoprint sends M112 to shut it down.
When the plate and hotends are homed, M119 returns that x, y, and z mins and maxes are open, as expected:
Recv: Reporting endstop status
Recv: x_min: open
Recv: x_max: open
Recv: y_min: open
Recv: y_max: open
Recv: z_min: open
Recv: z_max: open
If I manually touch the hotend (controlling it via Octoprint) to each washer, I then see z_min return “triggered”. This is what has me baffled, as manually, I can see the firmware returning expected results for probing.
I am not sure what else to look for or what my next steps would be. Does anyone have recommendations? Thanks in advance!