Something changed with my printer (MG Prusa, Marlin firmware) that has be a bit puzzled. When I used to home my Z axis, it would go down, trip the end-stop, then go up just a little and very slowly go down again, leaving the nozzle very close to the bed.
Now, it doesn’t do this every time, sometimes (seems like every-other time, but it’s not entirely consistent) it will go down until it hits the endstop, then back off and stop, leaving the nozzle way too high above the bed.
I’m not sure why this changed, I haven’t changed my firmware in quite awhile, and I’ve tried it with both Octoprint and Printrun so I don’t think it’s a host software thing. I also tried two different versions of Slic3r to see if that made a difference, but no dice.
Any thoughts on why this would change, or how I could force it to work the way it used to?