As I’ve noted in some of my other posts, I’ve had auto leveling problems ever since I got my Mini. I’ve worked around it, and I thought it was due to worn-out wiper pads, plastic on the washers, etc. etc. etc.
The extruder blockages that I’ve experienced in retrospect are also due to inaccurate leveling - the nozzle gets pushed down really hard on the washer resulting in an artificially large negative Z-offset which blocks the nozzle and causes filament build-up inside the extruder until it gets to the heat break and hardens.
But to my immediate problem: I’ve always had problems with the first washer, but now I get problems on the other washers as well. I used to be able to measure 5V between the nozzle and all the washers, but now I don’t get any voltage at all.
Is the 5V available all the time? or only when probing? What wiring do I need to check?