An additive manufacturing system for producing a workpiece from a substrate, the system comprising: a plurality of lasers (62", 66"; 62"', 66"') wherein each one of the plurality of lasers is configured to emit a respective one of a plurality of energy beams (64", 68"; 64"', 68"'); a lens (70"; 70"', 80"') configured to focus at least one of the plurality of energy beams (64", 68"; 64"', 68"'); a beam combinator ; and a housing (60"; 60"') wherein each one of the plurality of energy beams (64", 68"; 64"'. 68"') is configured to impart a hot spot (72", 74"; 72'", 74'") upon the substrate at pre-arranged distances (76", 76"') from one-another and the plurality of lasers (62", 66"; 62"', 66"') are configured to move the hot spots (72", 74"; 72'", 74'") in unison across the substrate at a controlled velocity; wherein at least one of the plurality of energy beams (64", 68"; 64"', 68"') is configured to reflect upon the beam combinator and at least one of the plurality of energy beams (64", 68"; 64"', 68"') is configured to refract upon the beam combinator ; wherein the housing (60"; 60"') is configured to move at the controlled velocity; wherein the lens (70"; 70"', 80"') and beam combinator are supported by and stationary with respect to the housing (60"; 60"') and the plurality of lasers (62", 66"; 62"', 66"') are constructed and arranged to move with respect to the housing (60"; 60"') to control the distance (76", 76"') between the hot spots (72", 74"; 72"', 74"'), characterised in that the plurality of lasers (62", 66"; 62"', 66"') have fiber optic outputs and the fiber optic outputs of each one of the plurality of lasers (62", 66"; 62"', 66"') are pivoted to produce a movement of the plurality of lasers (62", 66"; 62"', 66'"). a plurality of lasers (62", 66"; 62"', 66"') wherein each one of the plurality of lasers is configured to emit a respective one of a plurality of energy beams (64", 68"; 64"', 68"'); a lens (70"; 70"', 80"') configured to focus at least one of the plurality of energy beams (64", 68"; 64"', 68"'); a beam combinator ; and a housing (60"; 60"') wherein each one of the plurality of energy beams (64", 68"; 64"'. 68"') is configured to impart a hot spot (72", 74"; 72'", 74'") upon the substrate at pre-arranged distances (76", 76"') from one-another and the plurality of lasers (62", 66"; 62"', 66"') are configured to move the hot spots (72", 74"; 72'", 74'") in unison across the substrate at a controlled velocity; wherein at least one of the plurality of energy beams (64", 68"; 64"', 68"') is configured to reflect upon the beam combinator and at least one of the plurality of energy beams (64", 68"; 64"', 68"') is configured to refract upon the beam combinator ; wherein the housing (60"; 60"') is configured to move at the controlled velocity; wherein the lens (70"; 70"', 80"') and beam combinator are supported by and stationary with respect to the housing (60"; 60"') and the plurality of lasers (62", 66"; 62"', 66"') are constructed and arranged to move with respect to the housing (60"; 60"') to control the distance (76", 76"') between the hot spots (72", 74"; 72"', 74"'), characterised in that the plurality of lasers (62", 66"; 62"', 66"') have fiber optic outputs and the fiber optic outputs of each one of the plurality of lasers (62", 66"; 62"', 66"') are pivoted to produce a movement of the plurality of lasers (62", 66"; 62"', 66'"). <EOS>