Abstract: A method for additively manufacturing an object from a metal powder is disclosed. The method includes distributing a first stratum of the metal powder in a powder-bed volume at least partially delimited by a build platform. The method further includes melting a first selected portion of the first stratum of the metal powder in a powder-bed volume by exposing the first selected portion of the first stratum of the metal powder to electromagnetic energy from an electromagnetic energy source while moving the electromagnetic energy source along a first predetermined path in a polar coordinate system to form at least a portion of a first layer of the object. The electromagnetic energy source is movable in a linear travel path along a linear rail and the linear rail is one of rotatable or revolvable in a horizontal plane about a vertical axis A.

Abstract: A method for additively manufacturing an object from a metal powder is disclosed. The method includes distributing a first stratum of the metal powder in a powder-bed volume at least partially delimited by a build platform. The method further includes melting a first selected portion of the first stratum of the metal powder in a powder-bed volume by exposing the first selected portion of the first stratum of the metal powder to electromagnetic energy from an electromagnetic energy source while moving the electromagnetic energy source along a first predetermined path in a polar coordinate system to form at least a portion of a first layer of the object. The electromagnetic energy source is movable in a linear travel path along a linear rail and the linear rail is one of rotatable or revolvable in a horizontal plane about a vertical axis A.

Abstract: An additive manufacturing apparatus is disclosed. The additive manufacturing apparatus includes a linear rail having a length. The linear rail is one of rotatable or revolvable in a horizontal plane about a vertical axis. The additive manufacturing apparatus further includes an electromagnetic energy source movably coupled to the linear rail and movable in a polar coordinate system having a radius R.

Abstract: An additive manufacturing apparatus is disclosed. The additive manufacturing apparatus comprises a linear rail having a length. The linear rail is one of rotatable or revolvable in a horizontal plane about a vertical axis. The additive manufacturing apparatus further comprises an electromagnetic energy source movably coupled to the linear rail and movable in a polar coordinate system having a radius R.