@motti10 1. you can reset the offset height value of z axis. in the printing process, enter the option, know the Offset or baby steps option, and adjust the height 2. Check whether the limit is fixed by boat nut and the height can be adjusted. 3. Update the firmware program for increasing Z-axis height, put the program into SD card, and insert it into printer for reading. Ender-3 Pro- V1.5.1 - Lengthan-100 - English.bin