About this 3D model

https://www.youtube.com/watch?v=qci2Qgi7VGE https://www.youtube.com/watch?v=rPaKn7kD2EA http://www.youtube.com/watch?v=n8JjLbSEUFw After hot-end touches bed, Z stopped It better use with auto bed leveling system in marlin firmware. My configuration for marlin #define X_PROBE_OFFSET_FROM_EXTRUDER 0 #define Y_PROBE_OFFSET_FROM_EXTRUDER 0 #define Z_PROBE_OFFSET_FROM_EXTRUDER 0.4