Hi there ,,,
I'm using Gadgets3D LCD controller connected to RAMPS1.4 to control my smartrap printer, I can change my Z offset from marlin firmware (using arduino IDE) but can not change it from motion screen in my controller. if I try to it will limits me to the range from 0 to 3 eventhough it is been stored as -11.6.

// these are the offsets to the probe relative to the extruder tip (Hotend - Probe)
  #define X_PROBE_OFFSET_FROM_EXTRUDER 0
  #define Y_PROBE_OFFSET_FROM_EXTRUDER 20.8
  #define Z_PROBE_OFFSET_FROM_EXTRUDER -11.6
  #define Z_PROBE_OFFSET_FROM_EXTRUDER_DELTA_X 0.5 // smartrap: special quantic error mesurement from porte a faux design (see marlin.cpp)

The picture bellow explain more.

Any idea guys ?

Any idea please ?