I just had a situation close to what Wascally identified. I was surfacing a production piece at .5mm and everything was fine until the last rotation when the router dropped as far as it could and changed direction. I can’t tell you what the x, y and z reading where as I immediately stopped the run and moved the router to inspect the damage. It should be noted that I could not raise the router by the z control button until I hand rotated the lead screw a few revolutions. I don’t know what other information I can give as like I said every thing was fine for 99.9% of the run and now I’m scared of proceeding with work on this due to the cost of the wood piece involved. If you think this is a problem different from Wascally’s let me know and I will proceed accordingly.