It hits only after the first layer is put down. Instead of the bed dropping, I raises slightly. This is a Corey printer. All the controls work properly.mil am able to level and set the z axis without problems. It host the build on items sliced with Ultimaker cura and when using items sliced with Tronxy cura, it will start moving and then will reset the system. This is with items that have previously printed with those slicers and newly sliced items. Each slicer has objects behave differently the rebooting is what makes me think my control board is corrupted. The reset didn’t change any behavior.