Okay I had a job go bad the other day from the same issue. I just reinstalled estlcam and it erased my values for some reason. So I will be playing with this. His change log says he fix unequal axis, but I don’t see a setting for this at all.
So the easy work a round I think is to slow your max speed of your z axis in the firmware. It should not be able to go above this. The way I set the firmware we are a little below max, set at 8.7 and max is 8.9 I think. but I think I will lower this to stop this from happening if I can’t find the other rapid setting. I am not concerned with speed I just want good parts.