We’ve got a bit more information on the problem. The head starts printing .3mm above the bed according to the menu which looks about right. Does anybody know if there is some setting or calibration within the printer that could have changed? The first time that happened was when I set the bed temps and the print head to a higher temperature for PTEG. Nothing we attempt since that will lower the head to 0, not even when switching back to PLA and printing a sample file from the SD card. I read somewhere the SD card that came with the printer can also cause issues?