KiCad is for PCB design. For 3d printer you need to use something like FreeCAD (Free Open Source) or Onshape (paid closed source). You then need to convert the

KiCad is for PCB design. For 3d printer you need to use something like FreeCAD (Free Open Source) or Onshape (paid closed source). You then need to convert the 3d model for your printer using a slicer like Orca or Prusa.