Carving machine with auxiliary frame

In a carving machine, a frame comprising a pair of rail members, said rail members comprising rectilinear cross section tubes, each having one of its longitudinal extending corners projecting upwardly, cross members supporting said rails spaced apart in substantially parallel position, said cross members comprising rectilinear tubular members having open ends, a carving spindle arm support assembly mounted on said rails for movement therealong comprising a pair of wheels, one on each of said rails, and an auxiliary carving machine frame having a single rail thereon, and an auxiliary carving spindle and arm support assembly mounted on the auxiliary frame and having one end supported on said single rail, said auxiliary frame including auxiliary cross members which align with said cross members of the main frame when the auxiliary frame is mounted to said main frame, means to couple the end of the auxiliary carving spindle arm support assembly opposite from the single rail to the main carving spindle arm support assembly for movement therewith, and means to align and clamp cross members of the main and auxiliary frames together comprising interior plug means within the aligning tubular cross members on each of said main frame and auxiliary frames and serving to clamp said tubular cross members in alignment and in end to end relationship.