Machine for building a dome or sphere

A machine for producing independent of the ground, an outer wall of a circular structure of generally spherical shape said machine comprising an extruder connected to a radial arm that is rotatably mounted on a top of a column, said column having a bottom supported by a base affixed to said column, with a support assembly located beneath said base, said base having a periphery with a ramped track thereon, said arm and extruder being rotatable about a longitudinal axis of said column, said column being stationary relative to said base, said base containing a sealed passageway interconnecting said support assembly and said column, an interior of said column providing a pathway for electrical power and control cables and pipes carrying fluid material continuously from said support assembly through said base to a top of said column and through said arm to said extruder, said extruder being capable of extruding a wall from said fluid material which hardens on extrusion as said extruder travels around said longitudinal axis in a spiral path, said extruder initially travelling around said ramped track to form a first layer of said wall thereon, said extruder continuously moving along its own produced track in a spiral path to deposit successive layers, with each layer deposited forming a track for said extruder to deposit a subsequent layer, thus forming a wall on said base in the shape of a circular structure, said base being movable in any direction relative to the ground during formation of the circular structure, without interfering with said formation.