Some how between prints my Z-Axis on my Robo3d R1+ has gotten completely out of wack. I am using Simplify3d and am running an LCD Controller. The LCD allows me to move the axis' back-and-forth, up-and-down. When the printer ran the pre-print calibration the x and y axis worked but the z continually moved up until it started missing steps and I had t shut it down. When I try to control the Z-Axis on the LCD it moves up but thinks its hitting the z-switch and will not move down. Can someone help?