The Kappa works just like a typical polar printer that moves the print head up and down and in a straigbt line along the bed, then rotates the bed to access the rest of the build volume. It can do curves, if anything it needs to segmentize straight lines like a delta. The difference is X(across the bed) and Z are not independant, they are coupled in a sort of triangulation. I doubt it has a heated bed, unless the bed cant continously revolve (no vase mode if your print goes through the center of the bed?)