Can’t get the plate to move. Then I get the z switch broken error message. I did the plate levelingg process thru the piece of paper steps then after that completed. the head went home the plate rose and tried to keep going the starting with a whirring sound and stopped moving. I can’t get the plate to move with any of the plate up down controls. I tried to print something just before this and the head was about 7 mm above the pâté just making a big goo ball in mid air.