In Cura BlackBelt slicer set homing to: G28 X0 Y0
In the slicer homing of Z should be set to G92 Z0 – Current position of the belt is home for Z.
X Width to 250mm
Y(Depth) to 99999mm
Z(Height) to 175 mm (or 176)
X max 250
Y max 250
Gantry Height to some ridiculous number like 99999999999